[LB018132], Letter from Thomas Alva Edison to Erie City Iron Works, Frederick Alonzo Scheffler, July 22nd, 1884
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Title
[LB018132], Letter from Thomas Alva Edison to Erie City Iron Works, Frederick Alonzo Scheffler, July 22nd, 1884
Editor's Notes
Your favor of the 19th inst. unfortunately escaped my notice. In reply I would state that you would have to make the tube from two and one half to three inches in diameter to get rid of friction. If the tube is much smaller you will not be able to hear anything, but if you lay a large tube I do not see why you should have trouble.
Author
Date
1884-07-22
Type
Subject
Folder/Volume ID
LB018-F
Microfilm ID
82:721
Document ID
LB018132
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University