[LB005037], Letter from Charles Batchelor to Edward Hibberd Johnson, July 31st, 1879


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[LB005037], Letter from Charles Batchelor to Edward Hibberd Johnson, July 31st, 1879

Editor's Notes

We got your letter today and are glad to hear you had pleasant voyage. We send you today the eight instruments promised in my last: they all have inertia transmitters in them but not plumbago ones, we put in a small piece of carbon cut from one of the Jablockhkoff candles, they are simply immense and the beauty of it is you can talk either into the mouthpiece or six inches away and it is equally clear and does not lose its adjustment. In hte last four that were packed of this lot which have rubber mouthpieces, you will find that the rubber pressure spring has a pin from screw pressing on it, this we find, really gives better result than cap so we have sent you a number of the pins to put in the others. [drawing] We have also sent you a number of trnasmitter carbons although I don't see how you will ever need them. We also send you (8) eight extra chalk buttons which have not been wet at all. Edison says to please deliver two complete instruments to Puskas as only six out of this eight are billed to London. Will soon now give you a lot of these.




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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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