[N328AAA], Technical Note, Thomas Alva Edison, October 8th, 1886
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Title
[N328AAA], Technical Note, Thomas Alva Edison, October 8th, 1886
Editor's Notes
"Boil 15 carbons in strong KO Solution for one day then boil in large quantity H2O for 4 hours then change water again and boil 4 hours then take out & put in heater, dry and put in order No 20 & boil for 3 days-- Then Carbonize do the same with the HChl acid carbons now soaking-- Wash 3 lamps in Chloride Barium Sol weak to precip the SO4 from clamps-- work & set up for life-- Immerse carbon & clamp in gasolene & use another wire to form an arc on clamp so as to decompose CuSO4 & also the oxide-- think it will remain bright afterwards Use precipitated Magnesia & alumina-- precipitate from very dilute solutions so as to get them exceedingly finely divided-- Mix the dried precipates with 1st Sugar Solution, Licorice, Gum Arabic, tar, Molasses, Honey gum Tragacanth, press through mould into filiments. Try Lime mixed with the above also ([slaked?] Lime) Put piece asphalt in side cup with U tube, get vac cut it off from Lamp get vac then heat Asphalt, & let gas in-- Prepare N heat salt of Ammonia Nitrite Also intimate mixture of Chl Amon & Bichrom K this gives on heating H2O & pure N-- put in cup on U tube. If a formate be treated with conc SO4 pure CO given off-- Ferrocy K heated with 1/2 oz heated with 4 or 5 oz SO4 pure gas-- care must be taken as at certain point gas comes off almost explosively--
Author
Date
1886-10-08
Type
Subject
Folder/Volume ID
N328-F
Microfilm ID
43:859
Document ID
N328AAA
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University