ENDNOTES FOR CHAPTER TWO
1) Article Munsey’s Magazine.
8) TAE note Edison Electric Light Co, July 1887, Conot,
p. TAE Memo, 1888
W.
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. Nov 1888, 1888 Phono Gen. Lab.
7) Bank records Drexel, Morgan, E2530, 182.
4) Batchelor Diary, 1336, Sept 1887, pp. Lab General.0.H.
14) Draft Agreement with Villard, 1888 W. 30-38
6) Orange Herald.
435. 246. Henceforth letterbooks will cited LB
number then page number.
5) Edison’s Menlo Park laboratory described Robert
Friedel and Paul Israel, Edison* Electric Light (New
Brunswick: Rutgers University Press, 1986)pp. 394, 397.
3) TAE Ore Milling Syndicate, Feb 1901, 000608.
16) Article Munsey's Magazine.
2) TAE Hood Wright, Nov 1887, N871115.
10) TAE E. July 1901, 100521, p.
12) Bill Book #3, pp. July 1901, Letter Book (LB)
100521, 435.
13) Eaton Lewis Tate, June 1889, Miller file 121.
15) TAE Review Reviews, Oct 1910, 100829, 277. Johnson, undated, 1888 Phono General.
. 277-278. 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.O
