[LB007881], Letter from Samuel Insull to Francis Robbins Upton, August 10th, 1882
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Title
[LB007881], Letter from Samuel Insull to Francis Robbins Upton, August 10th, 1882
Editor's Notes
For your information I send copied below from a letter received from Mr. Batchelor of the following paragraphs.##Mercury [tubes]. [Con] know at Menlo Park leakage we had considerable difficulty with leaky mercury tubes I have struck a thing here that has just killed all that trouble. In all my tubing for 600 lamps there has now been the slightest [leak] it is this I put no washer [----] the flange of mercury cock but [----] it in to within a[----] of [shoulder] and then I [cap] fine [fish] and round it to fill up the gap. After this is [fixture] light I [s---] it with shallac in alcohol and when this is hard & soaked in it makes a most perfect mercury joint.##Socketing Moulds - I have cast all my socketing moulds of type metal and they work very well when the plaster comes out of mould they have the name on so. EDISON on one side & [Brown] [S---] on other deep in plaster.
Author
Recipient
Mentioned
Date
1882-08-10
Type
Folder/Volume ID
LB007-F
Microfilm ID
80:804
Document ID
LB007881
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University