10) TAE E. July 1901, 100521, p.
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 $88,900.0. Henceforth letterbooks will cited LB
number then page number.
8) TAE note Edison Electric Light Co, July 1887, Conot,
p. 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.
11) Insull’s notes Meadowcroft Box, #68. 277-278. 30-38
6) Orange Herald.
5) Edison’s Menlo Park laboratory described Robert
Friedel and Paul Israel, Edison* Electric Light (New
Brunswick: Rutgers University Press, 1986)pp. July 1901, Letter Book (LB)
100521, 435. 394, 397.
3) TAE Ore Milling Syndicate, Feb 1901, 000608.
7) Bank records Drexel, Morgan, E2530, 182.
4) Batchelor Diary, 1336, Sept 1887, pp.
15) TAE Review Reviews, Oct 1910, 100829, 277.
2) TAE Hood Wright, Nov 1887, N871115.
13) Eaton Lewis Tate, June 1889, Miller file 121.
16) Article Munsey's Magazine.H.
435.O.
.
12) Bill Book #3, pp. Johnson, undated, 1888 Phono General. Nov 1888, 1888 Phono Gen. Lab General.
14) Draft Agreement with Villard, 1888 W. Lab.ENDNOTES FOR CHAPTER TWO
1) Article Munsey’s Magazine. TAE Memo, 1888
W. 246
