The Phonogram (1902-08)

Page scan 0006 from The Phonogram

Record Details:

Title:
The Phonogram
Date:
1902-08
Volume:
The Phonogram (II), Issue 28
Leaf #:
0006
Language:
English
Subjects:
honograph,"Phonograph History, Thomas Edison","National Phonograph Company","Sound Recording History
Collection:
Recorded Sound
Coordinator:
Media History Digital Library
Date Added:
July 20, 2022
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spark is passed into the vacuum. This in turn produces a thin vapor of gold, which is deposited in the finest imaginable layer upon the Record. A thick backing of copper is then elec- troplated over the gold. Then the wax is removed, leaving in place of a cylinder, a thin tube. This is the Master Mould. Now we go back to the big red building, to the Moulding Room, on the ground floor. The door is closed. No one can enter; for there are secrets in all trades, and there are two or three very important ones in this particular industry. But the way the Moulding is done is not unlike the manner in which the Blanks for the former style Records are made. This is done at the Wax Plant, at the other end of the works, a “step of nearly a quarter of a mile. First * -t-ll *