[D7802ZGW], Letter from George Frederick Barker to Thomas Alva Edison, April 9th, 1878


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[D7802ZGW], Letter from George Frederick Barker to Thomas Alva Edison, April 9th, 1878

Editor's Notes

Glad to get TAE's letter -- wrote Wallace and he sent the makers address for substance suggested for inside boxes for the carbon button in the transmitter and Barker sends two pieces of the stuff -- It is made by the Vulcanized Fibre Company, No. 17 Dey St., NY; factory at Wilmington, Del. -- Wallace uses it for insulating backpiece of his magneto machines no rubber in it and can be molded into any shape -- Gray did not show Barker anything at the Centennial like TAE says is in his caveat of Feb. 1876 but did describe transmitter to vary strength of the current by causing a wire to vibrate up and down in a liquid thus varying the resistance -- thinks Gray probably antedates Bell even if Bell first to practically perfect apparatus -- will TAE let EHJ have big phono for Barker lecture will -- can he have new disc phono will give Phono Co big puff if they wish -- thanks for transmitter uses it considerably on short lines and talked to Menlo once will take it to Washington nextt week for Academy of Sciences meeting can he talk direct with Menlo from Smithsonian -- discusses musical transmission for his lecture




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