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