O. July 1901, Letter Book (LB)
100521, 435.
10) TAE E.
435.
4) Batchelor Diary, 1336, Sept 1887, pp. 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.
16) Article Munsey's Magazine.
2) TAE Hood Wright, Nov 1887, N871115.
14) Draft Agreement with Villard, 1888 W.0. Johnson, undated, 1888 Phono General. 394, 397.
12) Bill Book #3, pp. Lab General.
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. July 1901, 100521, p.
7) Bank records Drexel, Morgan, E2530, 182. Lab. 277-278.
3) TAE Ore Milling Syndicate, Feb 1901, 000608.
11) Insull’s notes Meadowcroft Box, #68.
8) TAE note Edison Electric Light Co, July 1887, Conot,
p.
13) Eaton Lewis Tate, June 1889, Miller file 121. Henceforth letterbooks will cited LB
number then page number.
15) TAE Review Reviews, Oct 1910, 100829, 277. TAE Memo, 1888
W.ENDNOTES FOR CHAPTER TWO
1) Article Munsey’s Magazine. 246. Nov 1888, 1888 Phono Gen.
5) Edison’s Menlo Park laboratory described Robert
Friedel and Paul Israel, Edison* Electric Light (New
Brunswick: Rutgers University Press, 1986)pp.
.H. 30-38
6) Orange Herald
