[D8332ZBZ], Letter from Francis Robbins Upton to Samuel Insull, July 20th, 1883
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Title
[D8332ZBZ], Letter from Francis Robbins Upton to Samuel Insull, July 20th, 1883
Editor's Notes
Regarding Batchelors lette-the test of the Swan lamps hown in the letter of July 2 is not favorable to the swan lamps. The economy at 16 c.p. Is given 7.9 per h.p. and the average life is only 575 minutes. # Regarding pump room report His results are the same as our. If if is the the number actually put on the pumps it is more than ours slightly. His clairifaction of breakage of breakage is all right. # With good carbons and good glass and glass work the breakage in the pump room is as small as we can ask for the men are careful # Regarding the variation in the size of our fibres Batchelor is correct according in his discovery that the shrinkage in length is different in degree from the shrinkage in width and thickness. Yet we are unable to find any marked difference in shrinkage. # We work more to the candle per H.P. proportiong lamps yet as you will form Howell's table that the surface bears a direct relation to this.
Author
Recipient
Mentioned
Date
1883-07-20
Type
Folder/Volume ID
D8332-F
Microfilm ID
67:229
Document ID
D8332ZBZ
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University