ENDNOTES FOR CHAPTER TWO
1) Article Munsey’s Magazine.
16) Article Munsey's Magazine. 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.
12) Bill Book #3, pp.
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. 246.H.
14) Draft Agreement with Villard, 1888 W. July 1901, 100521, p.
5) Edison’s Menlo Park laboratory described Robert
Friedel and Paul Israel, Edison* Electric Light (New
Brunswick: Rutgers University Press, 1986)pp.O.
2) TAE Hood Wright, Nov 1887, N871115.
15) TAE Review Reviews, Oct 1910, 100829, 277.
4) Batchelor Diary, 1336, Sept 1887, pp.
435.
10) TAE E.
3) TAE Ore Milling Syndicate, Feb 1901, 000608. 30-38
6) Orange Herald. Lab General. July 1901, Letter Book (LB)
100521, 435. TAE Memo, 1888
W. Johnson, undated, 1888 Phono General. 277-278.
11) Insull’s notes Meadowcroft Box, #68. Henceforth letterbooks will cited LB
number then page number.
7) Bank records Drexel, Morgan, E2530, 182.0.
8) TAE note Edison Electric Light Co, July 1887, Conot,
p. 394, 397.
13) Eaton Lewis Tate, June 1889, Miller file 121. Lab. Nov 1888, 1888 Phono Gen.
