A HISTORY OF EDISON'S WEST ORANGE LABORATORY 1887-1931

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