[N315021], Technical Note, Thomas Alva Edison, April 5th, 1886


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[N315021], Technical Note, Thomas Alva Edison, April 5th, 1886

Editor's Notes

[paired entry; see N317013] p. 21 "Carbonize less dense material such as paper, wood-- (pine willow etc) Licorice mixed with MgO by Auto preliminary to get high resistance then if stands well compound with MgO surface-- I think with perfect Carbzn The lighter materials will answer fully as well as bamboo & be exceedingly high resistance. Try parchmentzd paper White Holly-- Lampblack & Licorice MgO "[ditto Lampblack] Tar MgO Licorice MgO punch out of rolled sheets of this material"; p. 23 Mixtures for filiments which are soft can probably be rolled down between tin foil several layers of material & foil one over the other & rolled together thus obtained even. Several might be stamped out simultaneously bent in loop & Carbonized together. The foil melting or could be eat out with acid-- Thus making it easy to handle filiments"; p. 24 drawing of earpieces for deaf apparatus; p. 25 With Auto Prelim-- soak original filiments with Licorice, prelim & Carbz reg-- then soak Licorice & prelim & resoak two or 3 times then Carbonize regular This has never been properly tried.



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