[N315199], Technical Note, Thomas Alva Edison, April 23rd, 1886



p. 199 drawing "Fundamental see if the EMF os exactly same in tube without & with a very high vacuum"; pp. 201-3 drawing "Fundamental Exhaust fill with H exhaust & fill sevl times, then with ordinary Barometer gauge start pump & take EMF at 2 with X open until pump has been hour beyond reading by ordinary gauge break vac by letting in H & commence again make curve with X closed say 500 ohms-- also repeate at different resistances keep current same ie 20 c at high exhaustion also keep CP same 20 during all exhaustions & run curves with X open & closed-- also try dif gases Try a platinum Loop & Center plat wire-- also-- Iron Loop & Center platinum wire Use a regular lamp & make two center when exactly alike in length & size & relative position one plat one zinc see if diference"; p. 205 drawing "glass tube with wire in 10 or fifteen turns, vacuum in tube, see which is strongest with or without vacuum" (drawings); pp. 206-7 drawings; p. 209 drawings "Fundamental Ascertain if with a given vacuum manipulating L of F increases or decreases pressure--"; rest of book no dates: pp. 210-11 drawing appear to be magnets showing atoms; pp. 213-63 drawings, notes, and calcs re orbits and lines of force of planets in solar system







Folder Set



[N315199], Technical Note, Thomas Alva Edison, April 23rd, 1886

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