CENTIMETERS

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A SELECTIVE MICROFILM EDITION PARTY (1911-1919)

Thomas E. Jeffrey Senior Editor

Brian C. Shipley Theresa M. Collins Linda E. Endersby Editors

David A. Ranzan Indexing Editor

Janette Pardo Richard Mizelle Peter Mikulas Indexers

Paul B. Israel

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The original documents in this edition are from the archives at the Edison National Historic Site at West Orange, New Jersey.

ISBN 978-0-88692-887-2

THOMAS A. EDISON PAPERS STAFF (2007)

Director and General Editor Paul Israel

Senior Editor Thomas Jeffrey

Associate Editors Louis Carlat Theresa Collins

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Visiting Editor Amy Flanders

Editorial Assistants

Alexandra Rimer Kelly Enright Eric Barry

Outreach and Development (Edison Across the Curriculum)

Theresa Collins

Business Manager

Rachel Wcissenburgcr

BOARD OF SPONSORS (2007)

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Richard L. McCormick Maryanne Gerbauckas

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EDITORIAL ADVISORY BOARD (2007)

Robert Friedel, University of Maryland Louis Galambos, Johns Hopkins University Susan Hockey, Oxford University Thomas P. Hughes, University of Pennsylvania Ronald Kline, Cornell University Robert Rosenberg, John Wiley & Sons Marc Rothenberg, Joseph Henry Papers, Smithsonian Institution Philip Scranton, Rutgers University/Hagley Museum Merritt Roe Smith, Massachusetts institute of Technology

FINANCIAL CONTRIBUTORS

We thankfully acknowledge the vision and support of Rutgers University and the Thomas A. Edison Papers Board of Sponsors.

This edition was made possible by grant funds provided from the New Jersey Historical Commission, National Historical Publications and Records Commission, and The National Endowment for the Humanities. Major underwriting has been provided by the Barkley Fund, through the National Trust for the Humanities, and by The Charles Edison Foundation.

We are grateful for the generous support of the IEEE Foundation, the Hyde & Watson Foundation, the Martinson Family Foundation, and the OE Foundation. We acknowledge gifts from many other individuals, as well as an anonymous donor; the Association of Edison Illuminating Companies; and the Edison Electric Institute. For the assistance of all these organizations and individuals, as well as for the indispensable aid of archivists, librarians, scholars, and collectors, the editors are most grateful.

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EDISON GENERAL FILE SERIES

1912

Edison General File Series 1912. Deafness (E-12-30)

This folder contains correspondence relating to Edison's deafness and to devices for the hearing impaired. Included are requests for Edison's opinion of existing hearing aids, as well as inquiries concerning his plans to invent such a device. Most of the letters received no answer or a standard reply stating that Edison had discontinued his hearing aid experiments and that he expected to return to them in the future.

A sample of less than 5 percent of the documents has been selected. All of the selected documents contain marginalia by Edison.

The writer hereor labors under the dirTiculty

ol bearing that is impaired to such an extent that it greatly interreres with the practice or his proression, being unable to participate in the trial or cases to any extent.

Previous to said impairment l was a court reporter, and it has orten occurred to me that it would be possible to construct a ma¬ chine upon the principle or the phonograph, and other allied sound recording and reproducing machines which would produce a visual record or character ror each sound, and that alter surricient study, observation and practice one would be able to read this record just as short hand is read. ir this could be done.it would be a great aid to the dear and 1 would like to know whether you have ever made any experiments along this iine.ir so what results you attained, and if you have not made such experiments, what, in your opinion, is the possibility or constructing such an instrument.

Very Sincerely

hands so cleve rly that much of life's darkness is dispelled. Hear¬ ing not, nor speaking, hand, lip and eye are used to replace., the paralyzed senses to such an extent that much of the misery of mute existence is wiped away. Is it' not possible that since a partly deaf person hears quite Well through a telephone or ear-tube, since the phonograph reproduces sound and since electric messages are conveyed through space,- sans wire, sans pole, sans anything but an indefinable, unknowable agency - the electric spark- science may yet develop in¬ dumenta delicate enough, relative in some way to the antennae of insects and animals, which may convey to the nerves of the diseased sense almost the same impressions which they receive, via the natural organs in their healthy, normal condition It is not the .eye which sees, nor doth the.ear hear; neither doth the tongue produce sound.

All is impression conveyed by these agencies orttransmittens, via the nerves, to an inner seat of impression. May not these nerve conveyors be connected up, as it were, with some outside scientific, mechanical antennae which will register almost, if not quite the same

impressions which the natural, normal organ does?

f we see, hear, and speak in dreans, yet rarely is the organ

jot sense actually^*, J* it is patent thHt some an tuaL impression

(2)

must have been made on the inner receptacle because dreams or often vivid enough to remain within the memory for long periods of time. I do not knoW, hut believ? that it is possible that persons afflicted with the loss of the three senses referred to, may drean of speaking, hearing and seeing, even as the nornal person may drear, of being afflicted.

If the seat and nerve of impression is not impaired it doeB seem possible that they may be reached by some outside agency after the natural organ is destroyed, or that the organ itself may be aided in performing its natural function if it is merely paralysed but organically healthy. Blind as a bat or ua.molei deaf as a haddock or adder.

Seeing is a pictured impression. Hearing is a sound or vi¬ bratory impression. Sound or speaking is a vibratory impression.

We photograh, phonograph and telegraph. In accomplishing theBe thingB we have gone half the distance to make the deaf hear, the blind see and the dumb speak. Ahl How shall we make the rest of the journey.

We have applied these great mediums to pleasure and profit-making but done very little with them to relive humanities ills which is the greatest use they could be put to.

The eye is blind but the brain knows what it should see and what it wishes to look at. We are deaf and dumb in ear and tongue but the brain knows what it would say and what it would hear.

Even without the organ of expression every creature, I believe, knows instinctively love and feels musio, color, light and shade, danger at hand, presence of others and many other impressions which have nothing to do with organic transnission. Love and harmony and their attributes are part of Nature's law - Order. The attributes at leaBt are manifest even in inanimate objects and all creation is full of them. We have gone three-quarters of the distance, Bay !•

The Instrument§ The Antennae Scientif ique§ Ahl there's the

(3)

rub. To hear by it,, to Bee with it, to speak from it.

But God is good and desireth that we shall see, hear and speak even without eye, ear or tongue.

Artificial respiration, heart and muscular reaction in coma or apparent, yes, even actual death, prove that science can replace organic function if nerve and brain centres are healthy. Therefore the dead tongue may wag and laryngual imperfection be alleviated.

Eardrum and tympanum must be awakened and the diseased eye must give way to the miniature cinemetagraph. My eyes are ve ly poor.

Sincerely,

/$ Jj/iwipniff \sdhf~-

THE NATIONAL. NEWS SERVICE

My Dear Sir:

Every now and then some one of the newspaper paragraph- era or our old friend Fra ElbertUB Hubbard advertB to the faot that you are deaf and in spite of it oontinue to do the seemingly impossible .

Wherefore I am oontinually reminded of the saying aBoribed to Lincoln, when he was asked if he was aware that Ulysses Grant was a hard drinker " It would be a good thing if some others, would use the same brand of whiskey ",

I know you are the busiest man in the worldjand that I am threading , where Angels might properly hesitate to thread, when I venture to impose on your time and good nature by asking you to tell us in a few hundred words if you oan steal a few minutes from your work— what deafness has meant to you .

Have you ever felt that it interfered with the realization of any great problems upon which your mind has been set ?

Has it prevented you from evolving anything that with perfeot hearing you might have evolved ? What have been its oompensatiomS to you ? Has the enforced silence been stimulating and helpful through allowing you greater opportunity for concentration and uninterrupted thought ?

mis deafness; an affliotion? Does it impair a man's usefulness to the world , his oapaoity for efficient work or the enjoyment of the good things of this world T Will there be a time when there will be no deafness ? Do you use anything to aid your hearing when neoessary ? Have you ever tried to work out anything to relieve this condition ? What do you think of deafness gen¬ erally?

To many of your fellow countrymen these thoughts suggest themselves. To hundreds of thousands of those who are hard of hearing ,as well as to millions who are not, your views on them would be of surpassing interest and value . May. we have them;?

With assurances of yur appreciation of your courtesy and oonsii eration, believe us, !

THE NATIONAL NEWS SERVICE

New York City

Thomas A. EdiBon 3

Very Truly Yours,

NATIONAL NEWS SERVICE,

HM/FPM

General Manager,

Edison General File Series 1912. Edison, T. A. (E-12-31)

This folder contains correspondence and other documents concerning Edison's life story, his response to erroneous newspaper rePorts a^™’ his opinions on a variety of subjects, and numerous other matters. Most of the betters are unsolicited, but there are also exchanges with friends and businera associates along with letters pertaining to clubs, sc laebes and speaal everts, including Edison's birthday. Among the correspondents for 1912 are architect William Welles Bosworth, former employee H. F. Frasse, and Edison Pioneer" Sidney B. Paine of the General Electric Co.

Less than 10 percent of the documents have been selected. The following categories of documents have not been selected: unsolicited reauests for donations, employment opportunities, and interviews, routine requests for biographical and other information, including Edison s advice and opinion.

T

Mr. ThomaB A; Edison, Orange, N. J. My. dear Sirs-

. Jan. 1, 1912 LO-O 7^

Mg- , , -r J /ovt

.A very ; startling proposition has come lief ore me thii _paat week, .and since your name has been mentioned in the cireuQ prospectus I desired to., lear-a— little more about. the proposition..

I have reference -to the Telephone Herald .,

Is the ^system working satisfactorily and profitably in Budapest i Hungary-, . and do you- think -the system can he operated ' in this -cohntry. SS contemplated and - at -a prpf i t . I should- very

much like to have your opinion op this proposition, and, any “-information- that you might-care to give me would he appreciated.

'I enclose a stamped and addressed envelope that you may reply at your ^convenience.

Yours, very truly,

frohn^ Peters .

Mr. Thoe. A. Edison, LlewellinPark, Orange, N. J.

Dear Sir:-

It gives me great pleasure, as one of the boys who carried material to you some 30 years ago when you were in Pearl Street and Gar ri ok St., and later in Menlow Park, etc. to enolose herewith a small photograph of the oil painting presented to you as a recognit¬ ion of your services to the entire world.

I only regret that the little cam¬ era I had with me was .not able to portray this in a better way.

I was somewhat sceptical as to re¬ sults whatsoever, but if the bottom leaving the ohair, be oovered, it makes a rather tasty reproduction of your almost speaking likeness.

I often hear of you because my youngest son frequently sees one of yours at the Montclair Academy.

The vertical lines,- striations are, very likely, *due to the reflection of the light from the windows behind me when I took the exposure.

Very truly yours,

gf. gfr*^**

HFF.

THC.

Office- of

WILLIAM -WELLES -B OSWOKJ Architect

Thomas A. Edison Esi grange, H. J.

Dear Mr. Edison:

It was a pleasure to hear from you and to have a specimen of your beautiful signature which I have always admired and shall always keep. It expresses to my artist's mind the sweeping imagination of far reaching thought combined with, and balanced by the painstaking care so essential to bring any scheme to productive maturity.

\ V * NEW ‘YORK

/Aiy^

My visits to you and the sound philosophy you preached make a profitable and agreeable memory and I shall be glad when the time arrives for you to give me another occasion for being with you.

I am now making planB for a sky-scraper for the Western Union Telegraph Co. at Broadway and Dey Streets. There is a quarter inch scale model of it here which I should enjoy showing you if you will come in the next time you are in town .

Very sincerely yours,

WWB+AMG

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PHILIP FARNSWORTH COUNSELOR AT LAW 42 BROADWAY NlfW YORK

TEVCPHONE 4.00. .ROAD JUljT 30th, 1912.

Mr. Thomas A. Edison,

Orange, N. J. Dear Mr. Edison :r

I enclose an old photograph which has Just been sent me hy a friend who knew that I had heen employed in some of your patent litigation. You may have a duplicate copy but you are welcome to this if you care for it. /

Very truly yours,

i

■(Jy 30; /<?/£)

[ATTACHMENT/ENCLOSURE]

lolegram Bald-- 9/30/12.

p. K. Dolbeor,

fouradne Hotel,

Boston, Mass.

Prom City and telephone directories, also any other sources available ascertain if family name of Cryaa live in lynn, and if death of any porson name of Oryon has occurred in past few days. ChiB information wanted by Mr. Ediocn but without publicity, therefore v use diplomacy in obtaining it.

C.H.Wilson.

the front page of which has particularly interested, me.

In the early days, when I knew you so intimately, you worked daily, in fact, all the time, whereas hy the title of this pamphlet you now only work monthly. Another thing, you are leaving the office so much earlier than you formerly did. In the old Goerok Street days you did not leave the office at all hut, apparently, from this picture you are leaving at four . minutes to three. It is possible that your old habits have stuck to you and you have delayed going to lunch until this time, but some of the men in my office, to whom I have shown the picture, have inquired if "Mr. Edison works as short hour's as pictured". I have assured them that you did not when I worked for you, nor did you allow anyone else to.. It may be that the illustration is wrongly interpreted, and the clock has stopped, and it is necessary to"punoh"it to start it again.

Seriously. I think this publication is a great credit to your son. and it brings back the old days when I had the pleasure of being more closely associated with you than I am at present, the memory of which days is one

of the choicest

GENERAL ELECTRIC COMPANY

Thomas A. Edison, Esq. , October 31, 1912

possessions which I have.

It is 31 years ago the 12th of this month sinoe I became associated with you, when you seoured Spencer Borden as your Agent in Bristol County, Mass., and he in turn hired me to sell your dynamo under his agency.

Sincerely yours,

)

It Is several years/since I have had the .pleasureoof meeting and talking with y6u,buy'T shall never forget that Saturday night a.t Menlo P^rk.N.J. when Onariie,L.Cia'rk6, and myself ran a test of your First Circuit of Incandescent lamps, and the Successful result.

X still. have spme of the Indicator diagrams that we took from the Brown Engine (In Iftk) and they are very highly prized by me still. Like yourself I ha vb been very busy since that time’, and have‘ developed, many things which have been- of service to mankind-.

Am encloseing a Folder describing a Cutting preparation which is leading them all, in the West, and it is taking first rate around here. Have received orders from many of the leading concerns, more particularly .the Railroads, which are so hard to land. But they are looking 'for an opportunity to save a dollar as are most of us in manufacturing. _

•T This preparation is used largely by ttie" Western Elec¬ tric, Company, and- others in the same line. I give you my -word of honor that all of the Extracts from letters offered in the enclosed Folder are GENUINE COPIES FROM THE ORIGINALS IN OUR FILES .

Would like to send you a Half-Barrel for use - Doht need

a trial - and it will not be TWENTY FOUR HOURS BEFORE YOU WILL DECIDE

THAT YOU WANT IT. In this I judge from experience. .

We are beating the best lard oil - Five To. One. (See let¬ ter herewith, on page 5 of the Folder. ' , .

If approved in accordance with Guarabtee',on page 2, it will cost you (Special Price) 5§-/S per pound, f,o,b, cars, at Destination.

' The Elevator Lubricating Compound is also a most valua¬

ble preparation for, use in. the water for' operating Hydraulic Appara¬ tus, Accumulators, etc, etc. and costs 7-&-P per pound, as above. i

.Please tell me What is the name of that Acid or Gas liber

ated by the burning of paper on thq Cigarette ? .’I had it but have for¬ gotten. You know that, it is often met with in the laboratory, and is a- permanent damage to all animal tissue , I believe you are quite right. Am very glad to see that you. are. "A BULL ModSE" ?So am >1, and have alw- ays voted for Theodore , Roosevelt . Expect1 to do so agai'p'Homorrow.

I believe that an sensible- man are really BULL MOOSES AT HEART, Don 't you ???. Am most sanguine as to the result, Have great faith. Eh-Whatl Very truly yours. ~

f: bmunb jtatorcnrc JDutlun JijarUarb Sato SkIjouI (lombtibijc. JilasB.

Thomas A. Edison, Esq., 79 Fifth Avenue,

Hew York City.

As a graduate Law student, and now a candidate for the degree of Doctor of Jurisprudence, the Harvard Law Faculty has assigned to me as the subject of a thesis, the questions "Does actual law conform to business necessities?"

The subject being a practical one, I wiBh to treat it from a practical standpoint. V/ith that end in view, I desire to prooure authentic information from a very limited number of representative persons. I will greatly value an expression of your opinion on the subject, as well as to receive such further suggestions as you may care to make to me with regard to thetreatment of the same.

With the assurance that whatever you may have to offer is not desired for purposes of publication and with deep appreciation of your courtesies, 1 beg to remain,

Fatkmebs &>Ii!B€HATinrsKMrioM!iSBAH,K:

Kr. Thomas A. Edison/^X ^ ^

East Orange, N. J.

Dear Vr. Edisonj-

SeverRl years ago little town, and appreciating

4 >

£ /\K .

when ycu^visiti jiJWd:

- - - *. - y- fr

opposite the Hotel where you stopped, T was ti^fl that^ou

remrrked that at one time, some years ago, 3 position in a bank as note clerk, and spoke strain upon the mind of a mar, filling that position.

I have filled the position of note- clerk for a number of years, handling, on ar average, of twelve thousand notes each year, and know ing the trouble and worry connected with the position, 1 would appre-

» confirmation of the remark made by you while in

ciate £ city.

Thanking you in advance for your \ , I beg to remain.

Very respectfully,

Edison General File Series 1912. Edison Club [not selected] (E-12-32)

This folder contains correspondence and other documents concerning the Edison Club, an employees' organization founded on October 12, 191 1. The documents consist of meeting announcements, receipts, and correspondence concerning the design of medals.

Edison General File Series 1912. Edison Crushing Roll Company (E-12-33)

This folder contains correspondence and other documents relating to the Edison Crushing Roll Co., which licensed and installed Edison s crushing rolls and collected royalties for their use. The one selected item is a report to Edison from his associate, William H. Mason, concerning his visit to the Anaconda Copper Co. in Montana.

The unselected material consists of periodic reports pertaining to the operations and output of licensees, along with correspondence concerning the collection of royalties.

The Edison Crushing Roll Co.

ROCK CRUSHERS WORKS OFFICE. STEWARTSVItlE. N.J.

Mr. Thomas A. Edison,

Orange, H. J.

Dear Sir:-

I have juBt returned from a trip to the West, and heg to report the following: -

I arrives at Anaoonda, Montana, on Jan. 11th, went into the question of coarse and fine crushing with the Anaoonda Copper Co. people very thor¬ oughly, in fact, spent two whole days disousBing the matter with their engineers, Mr. Demond and Mr. laist, and their General Superintendent (who seems to he the active manager) , Mr. Wraith.

All of their ore, 10,000 tons per day, comes in in 50-ton steel railroad oars from various mines around Butte and Anaoonda. It is then dumped from the hoppers of the oars and passes through three or four jaw oruBhers in parallel. These reduce it to about 2" Bize, when they begin concentrating by jigs. The concentrate of between 2" and 1" goes directly to blast furnaces and is reduced here to copper mat. There is also a certain amount of high grade ore, carrying over 5% copper, which goes directly to the blast furnaces without concentration but iB crushed to about sizes. S*ene smaller than 2"

ia re-crushed through^ rolls shout 48" in diameter and 18" face, and re-concentrated hy jigs. The smaller size a^Sne ia re-crushed in wet Huntington mills, and concentrated on Wilfley tables, the whole process being done wet, except the primary crushing. The fine concentrates below about 3/4" size are taken to ' reverbatory furnaces, and Bmelted into a mat. The concentrates from the extremely fine ore say under 60 or 80 meBh, are first roasted to drive off a portion of the sulphur, and then delivered to the reverba¬ tory furnaces.

The copper mat from both blast furnaces and reverbatory furnaoes is put into converters and oxidized

down to a fairly good grade of copper. This is then put

6~oo

into a refining furnace and the pig copper is cast in^ slabs ready for electrolytic refining. The latter is done in the Bast, when a great deal of gold and siver is obtained from the raw oopper.

Their proposition is to put 'in one central crushing plant, through which everything could be dumped, which must have a capacity of 1,000 tons per hour, as they expect to increase their plant to at lease 15,000 tons per day, but they work 24 hours per day, three shifts, and would figure on running the crusher plant two shifts of 16 hours.

A portion of their ore is fairly hard,

T .A. 35,

-3-

I should say about as hard as our Oxford limestone, but ore from other mineB is quite soft, of the porphory variety.

The largest stones that come to them now are about 30" in diameter, and they only want to reduce it to 2" for whioh I re comended a series of four sets of Rolls, so as not to pulverize any material unduly, bo as not te .pulwo r i z e -any -mat ex±a£a»rda%y , allowing each set easy work. Their present dumping and crushing coBts are in the neigh¬ borhood of Zi a ton, and their whole idea of putting in this crushing plant is to reduce the expenses and give them larger capacity.

They also have a quarry producing about 1,500 tons of limestone per day, which they are operating by hand, and the costs over the year which they showed me were 19^ per ton. I could not understand this low cost for hand work, with labor at $3.00 per day, until 1 went to see the quarry, and then found that although a compara¬ tively hard limestone, it was so broken up with seams and striations that they used black powder for bringing it out, and there were comparatively few pieces that came out over 12" in diameter. The face of this quarry is about 600 ft. long and about 250 ft. high, and getting higher as they go back. 1 recommended to them using one set of 5 x 5* Rolls in thiB quarry, with steam shovelB to do the loading, and

T.A.E. -tf-

advised them that they should he able to save at least per ton in the operations.

They would not hear of 2( / a ton royalty as their present crushing costs are about 3d' and they could not see where they would he warranted in making the invest¬ ment , as they do not expect to he able to save anything on their mining operations. I, therefore, told them, after going into the matter very thoroughly, that in view of the conditions, only crushing about 30" dia. stone to 2", that I would recommend to you antf installation of an ore crushing plant at the mill and a pair of 5 ft. Rolls at their quarry; if both together, at a 1^ per ton royalty, and that it was a matter which you would have to decided, as I had no authority to decrease the price under 2< i per ton. Their Gen, Supt., Mr. Wraith, seemed to think that this was a fair proposition and adviBed his engineers to make up a complete report with all the information which I could give them, so that he could submit it to his Board and see if they would authorize an appropriation for installing the plants.

I left Mr, Wraith and he intimated that he expected to take the matter up with us further, and also took addresses of all our various plants, so as to write them and get infor¬ mation as to operation of our Rolls.

Mr. Wraith also gave instructions to

T.A.E.

-5-

Mr. Demond to pick out 100 Its. of an average Bample of their second grade ore and ship it to you, which I presume has been done.

UTAH COPPER COMPAHY:- I next went to Salt lake City. Called to see Mr. Jackling, of the Utah Copper Co. Mr. Jackling was not in, hut Mr. Bradley, hia Chief Engineer, advised me that they had investigated the Edison Rolls and did not think they were satisfactory for their purposes. He, however, gave me permits to go through their quarry and the plant .

The quarry is at Bingham Canyon, about 18 miles from their plant, and it is a montain about 3,000 ft. high, on which they were working about 2<b steam shovels in various benches. There were approximately 16 benches.

Some of these shovels, however, were stripping, and they are now shipping to their two mills 15,000 or 16,000 tons per day, and after they have finished remodeling one of their mills, which they expect to do within the next three months, they expect to handle 20,000 tons per day of 24 hours.

1 was told by the quarry boss that there - is 140 miles of railroad on the quarry mountain, so you can get an idea of the size of it. They have Just builttheir own railroad from Bingham Canyon to the two mills, which is about 18 miles long and very heavy work, and they have

T.A.E.

-6-

three Mallett compound locomotives of 225 tone each, for hauling their ore trains. The rock is a soft porphory , hut in a few places they find it quite hard. In many of the places they can bring it down with black powder and very low grade dynamite. The steam shovels load directly into 50-ton special steel hopper cars. These are hauled in trains of 30 to 40 cars to the two mills, the Magna mill, which has a capacity of 15,000 tons a day, and the Arthur mill, about one mile farther, will have a capacity of about 6,000 to 7,000 tons per day. These oars are dumped into pockets over bins which contain grizzlieB and screens. This separates the coarse ore from the fines. The coarse ore goes directly to 7i gyratory crushers (four in parallel) then is screened, and the coarse goes to smooth rolls shout 56" in diameter and 18“ face. It is then screened and carried to smaller rolls, and then to Chilian mills; (there are about 36 of each of these) , then to a set of 36 Wilfley tables, which make a rough concentration. All the material then passes over frujvdnners.

Practically everything is crushed to 20 mesh and finer before the concentration begins. They concentrate 24 to 1, and then the concentrates are loaded and shipped to the Garfield smelters, a mile or two away.

from 1.55$ to 1.80$ copper, and they

The copper ore runs

T.A.E.

-7-

figure that they get 78# of the total copper in the ore, the 22# being lost in their tailings, and they say that practically all of this goes out in the slimes. I got the following figures, hut cannot say whether they are authentic or not. Mill costs for handling are:-

Unloading and coarse crushing (to 1” size) 2.14 Pulverising down to 20 mesh 9.0

Concentrating 7.0

Various other charges, etc., bringing the total mill cost up to about - - 224 or 29?

per Ton.

I think that the total cost of 28^ or 29^ is right, but cannot say how close the other figures are or just what they include.

The mill manager, Mr. Hoffatt, was very cordial and very much interested in our crushing system.

He said that it was necessary for them to put in a central crushing plant whioh would handle their total ore for both mills (20,000 tons a day) bo as to reduce the costs, as their present system was expensive and inefficient and did not compare with the rest of their plant/ I explained to them what our crushers would do, and he went into details very thoroughly and said that he would take the matter up with their manager, Hr. Jackling.

The next day I went in to see Hr. Bradley again, and explained to them what we could do in the way of a central crushing plant. He became very much interested

and said that he was satisfied that they would build another crushing plant this year, and said he expected to come East and investigate the crushing matter, and he had no doubt that they would take the matter up with us in the near future.

I could not interest them in fine grinding, because they are afraid to handle anything dry, and are of the opinion that the cost of drying and the labor troubles with the dry mill on account of dust, and the expensive methods of handling the ore through various elevators, eto., instead of sluicing it as they do, would eliminate the possibility of a dry crushing plant competing with the wet, and they seemed to have it very firmly fixed in their heads that a dry crushing plant will make more slimes than wet crushing.

I could not see Hr. Jackling, as he was down in Arizona on a new oopper proposition, and did not expect to be back for some time, but I believe the** chances are fair for installing one complete crushing plant for these people, and they are certainly doing things on a magnificent scale.

NEVADA CONSOLIDATED MINING CO.:- I alBO met Mr. C, B. Lakenan, general manager of the Nevada Consolidated Mining Co., who are handling about 8,000 tons per day with

h, steam shovels on porphory ore, also concentrating it and smelting it at the Stepto Concentrating Works, MoGill, llev.

Mr. Lakenan was not very cordial and seemed to think he knew a great deal more about crushing and handling ore than anybody in the world. I, therefore, did not go to their plant, as there porphory, I understand, is even softer than that of the Bingham Canyoh (TItah Copper Co). I, however, got the names of some other Companies that are being started, and will take it up by mail, to see if it is possible to interest them.

One of these is the Inspiration Copper Co., located in Arizona, which is being Btarted and will have at first a capacity of 7,000 tons a day, with the idea of in¬ creasing this to 15,000 tons.

I e:q?ect to be down to see you in a few days, and will disouss the matter more fully.

Yours very truly,

WHM-HB8

Edison General File Series 1912. Edison Star [not selected] (E-12-34)

This folder contains unsolicited correspondence relating to the myth that Edison was responsible for a bright light appearing in the sky above Menlo Park, N.J. Edison denied responsibility and stated that the light was the planet Venus.

Edison General File Series 1912. Education (E-12-35)

This folder contains correspondence and other documents concerning Edison's opinion on technical and other forms of education. Most of the correspondence consists of unsolicited inquiries. The selected items include a letter from Edison to students in New Jersey grammar schools "telling something of my own school-days."

Less than 5 percent of the documents have been selected. The unselected items consist of routine inquiries with no substantive reply from Edison.

Dear young -friends

I have been asked to write a letter to the hoys arid girls of the Grammar Schools in Hew JerBey telling something of mv own sohool-days. Suoh a letter as that would he very short, for I really never had any school-days as you understand them. I was rather delicate when a

sending me to sohool, my mother, who had been a High School teacher, educated mo herself at home. She the one

pupil, which was fortunate for me as X r ec e ived thor sound teaching. My mother also taught me how to read S°od hooks quickly and correctly, end 6s this opened up a great world in literature, X have always been very thankful for -his early training.

I was fond of experimenting, so when I was about 12 years old I got work as-a .train nawBboy in orderto earnmy own pocket money to buy chemicals and apparatus with Whichto experiment. My train ran from Sort Huron to Dftroit. and this eave me opportunity to go to the libraries in the latter oity fndreld books that could not be found in Port Huron, where I lived I always kept busy and had lotB of adventures in trying to add to myefore of knowledge