[NP021E], Technical Note, Thomas Alva Edison, October 4th, 1886
https://edisondigital.rutgers.edu/document/NP021E
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Title
[NP021E], Technical Note, Thomas Alva Edison, October 4th, 1886
Editor's Notes
"Boil fil bamboo also carbons in Coal tar until carbzd also in Asphalt thinned by Turpentine also Carbons High tempture Oxalic acid melts 212 C Boiling P Benzoic acid 225 C Saccharose (cane sugar) 160 C melting point Soak Bamboo fils in Cupric Ammonum few min also dip & allow sol to dry-- Carbonize Treat some bamboo fils with HCl-- SO4-- KO Ammonia Carbonize also same but wash by soaking in H2O [following written on left page appears similar in pen and writing to preceding sentence: "1 pt Cotton wool be disolved in Mixture 24 pts SO4 & 6 pts H2O a gelatanous precip is thrown down on adding more water This is amyloid same as outer coating of parchment paper" following text seems to have sharper pencil but might put after Have mills...] Have Mills Cut some parchmentized paper filiments reg Z- Boil in Molasses 10 hours dry & carbonize also carbonize the paper fils witout soaking & then Boil carbons in Molasses also sugar Make a shaving knife [drawing]
Author
Date
1886-10-04
Type
Subject
Folder/Volume ID
NP021-F
Microfilm ID
44:179
Document ID
NP021E
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University