Several other experimenters worked here, did Mrs. nos.374
Photographs these experimental rooms dated 1939 show rooms for battery and
other electrical testing, offices with drafting tables, vacuum pump rooms, and a
small machine shop. The development and testing work was carried out this building while
the design and production engineering was done elsewhere.
372 "List Active Matters," memorandum TAE, March 17, 1921, D-Box Collection Box 23, "Edison
Files."
373 NPS, "HSR, Metallurgical Laboratory, Building No.440/106, neg.
The development the Edicraft line kitchen appliances was effort regain
some the consumer market that the Edison phonograph had lost the late
1920s.
An important innovation that was hurriedly introduced bolster the Edison
phonograph business was the long playing record. 4,” 5.
Coakley who acted domestic science consultant the Edicraft project.373 The experiments long playing records
would have used the pressing equipment and recording facilities set in
Building 4.
374 Ibid.375
112
.
375 See photographs 12.440/102 through 12.372 likely that the two latter activities took
place Building 4. 8098 through 8102, Photograph Album
43, catalog 751 (not reproduced for this report).
worked room the rear the building one group offices
established the 1920s. J.machinery press disc records. This was developed Building
4 and finally introduced 1926. Thomas Edison Jr
