[NP020F], Technical Note, Thomas Alva Edison, March 20th, 1884


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[NP020F], Technical Note, Thomas Alva Edison, March 20th, 1884

Editor's Notes

[SELECT, at least portions relating to celluloid?] TAE In Florida [also refer to X120CAI] "Try dry salts of cupric ammonia & cellulose with heat to disolve for substitute for celluloid." A separate entry this date: "See if there is not a volatile compound of calcium magnesium, etc whewreby a deposit of oxide can be put on filament by electrical incandescence." More notes on trying to get smooth filament surface: rub it with pumice stone. Image 13: See if bladder intestine, etc horn can be tanned or effected by tannic acid. Ascertain by experiment everything that will precipitate glue from its water solution. Also if glue is soluable in any other liquid than water. [more cellulose experiment] Notes on making flexible sheets; "French polish filaments with various things to get shining surface of carbon." [Image 15] "Try experiment of using linseed oil mixed with finely divided electrotypers plumbago between carbon plates agitating the liquid so as not to allow actual contact & keep adding plumbago as long as it comes down in resistance another way perhaps better is to mix finely divided metal as an acid will take that out of the linseed [---]. Try the effect on linseed & cottonseed oil of various oxidizing agents with & without heat, thus nitrate potash, hot sulphuric acid [etc etc] [image 16]: "Utilization of bran combined with cementing material & hydraulic pressure to make base material for all uses......[describes possible mixtures]."[image 19Vegetable filaments]: "Get large pound potatoes slice them then dry under gentle pressure to make carbons from. Also turnips, pumpkins, squash, eggplant, apple, turnip, beet. " Carbonize licorice. [was TAE going hungry?]



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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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