[NP029A], Technical Note, Thomas Alva Edison, August 28th, 1887
https://edisondigital.rutgers.edu/document/NP029A
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Title
[NP029A], Technical Note, Thomas Alva Edison, August 28th, 1887
Editor's Notes
Phonograph Try soap cylinder & after indentation harden with an acid Try gum camphor as a base-- Mix Kaolin with glue water-- Kaolin with boiled Linseed-- Soap cylinder coated thin glue-- Kaolin made plastic with water & put around cylinder-- Venice turpentine as a softener-- Canada Balsam as a softener-- Vaseline with Parafine to soften-- [drawing] Cut cylinder thus with extra tool-- then make a knife edge recorder [drawing] This shape so needle will record hiss easy but great amplitude. Less costly experimenting will develope proper shape for perfect articulation [drawing] See how thin wax beeswax can be squirted into sheet say 002 thick & use on cylinder like tin foil-- might add Rosin to harden it if at 1st it don’t work How thin can sheets of flue be made by squirting & pouring on glass-- greased if necessary-- See if Vulcanized fibre can be drawn through Saphire dies-- Have Ott draw some Agave- [Amgou?] Bamboo-- Bast-- & palm & have them carbonized see how look under Micro [from here to end may be from other date[s] last appears before date of Feby 18] Try Napthaline as hardner Anthracine Paranthacine Pyrene Chrysene Picine Bengerythren MP 308 Carbopetroucene 268 Chlorinated Tulene--MP 153c Heptacholoranstruancine M.P. 350c Benzoil acid 119c" Add to Reg phono wax as much of following as they will take up-- Kaolin-- Chalk. Oxide Zinc, Talc, plumbago Carb Magnesia Crude Lamp black to prevent expansion. Try that Gum amalgam as hardener Napthalene dicarboxylic acid not fusible at 300 formula--C12H8O4-- Like a Carbohydrate-- Triacetyl Cellulose C12H16)8--MP 232 Perhaps this can be used as 17 or [regenerated? To fils. Isodeoxystearic acid. Melts 126C--phonogm A17-- Formoguanamina C3H5N5 Anhydroxalanilide. C14H10N4 not fusible at 300C Phenlynapthyl Carbazole C16H11N PM 300 C Dianthramine C28H19N Nofusible 370C Octochlorpheylene Oxide C12Cl8O2 MP 320 boils at Hg Perchlorlrphenylamine C18Cl15N Not fused at 270-- perhaps these Cl & ClN compounds can be mixed with powdered C & squirted, only Cl & N go off as there is no O or H to Voltatilize C. Cyanic Bormide MP above 300 [degrees] C3Br3N3 Pentabrombenzonital C7Br5N-- MP above 300 Phosphorous Tricyanide. C3N3P-- MP 203 C. Wax of Ficus gummiflua used in Java for illuminating Brown & brittle Metls bet 60 & 70 C
Author
Date
1887-08-28
Type
Subject
Folder/Volume ID
NP029-F
Microfilm ID
106:169
Document ID
NP029A
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University