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