[MBN002041], Technical Note, Charles Batchelor, July 31st, 1877

Item

Abstract

Apparatus for getting Sh Th and S not perfect and alter device and begin new experiments with diaphragms of different materials and different spring designs -- instead of solid plumbago make it into a cake and talking is perfect -- plumbago likely to shake and deteriorate and perhaps can make band of it and continously expose a new place

Date

1877-07-31

Decade

1870-1879

Identifier

MBN002041

Folder Set

MBN002

Title

[MBN002041], Technical Note, Charles Batchelor, July 31st, 1877

Microfilm ID

90:677

Publisher

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