[D8104E], Letter from De Castro (D.) & Co, J B Ramirez to Thomas Alva Edison, January 5th, 1881
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Title
[D8104E], Letter from De Castro (D.) & Co, J B Ramirez to Thomas Alva Edison, January 5th, 1881
Editor's Notes
Please send us all information about the megaphone. Marg: "The megaphone is a very large instrument for talking a mile away probably you refer to an instrument for the deaf. I have not had time to perfect it so as to be able to introduce it commercially."
Author
Recipient
Date
1881-01-05
Type
Folder/Volume ID
D8104-F
Microfilm ID
57:36
Document ID
D8104E
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University