Lab. Henceforth letterbooks will cited LB
number then page number.
10) TAE E.
12) Bill Book #3, pp. Johnson, undated, 1888 Phono General.
3) TAE Ore Milling Syndicate, Feb 1901, 000608.
435.
8) TAE note Edison Electric Light Co, July 1887, Conot,
p.
. July 1901, Letter Book (LB)
100521, 435.
5) Edison’s Menlo Park laboratory described Robert
Friedel and Paul Israel, Edison* Electric Light (New
Brunswick: Rutgers University Press, 1986)pp.
4) Batchelor Diary, 1336, Sept 1887, pp. Nov 1888, 1888 Phono Gen. The data available for 1890 shows that the year’s
experimental work was billed about $80,000, showing that
Edison’s estimate operating costs was fairly accurate. TAE Memo, 1888
W.H.
9) One his first estimates the yearly cost running the
West Orange laboratory was:
1) Interest Investment (opportunity costs an
investment 184,000 5%) $9,200
2) Insurance $1,100
3) Depreciation 9,200
4) Supplies 7,000
5) Labor costs 62,000
This makes total yearly operating costs $88,900.
15) TAE Review Reviews, Oct 1910, 100829, 277. 30-38
6) Orange Herald. Lab General.0. 277-278.
2) TAE Hood Wright, Nov 1887, N871115.
7) Bank records Drexel, Morgan, E2530, 182.O. July 1901, 100521, p.
16) Article Munsey's Magazine. 394, 397.
14) Draft Agreement with Villard, 1888 W.
11) Insull’s notes Meadowcroft Box, #68.
13) Eaton Lewis Tate, June 1889, Miller file 121.ENDNOTES FOR CHAPTER TWO
1) Article Munsey’s Magazine. 246
