440/102 through 12. The development and testing work was carried out this building while
the design and production engineering was done elsewhere."
373 NPS, "HSR, Metallurgical Laboratory, Building No.
An important innovation that was hurriedly introduced bolster the Edison
phonograph business was the long playing record.machinery press disc records.
Coakley who acted domestic science consultant the Edicraft project.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. Several other experimenters worked here, did Mrs.
372 "List Active Matters," memorandum TAE, March 17, 1921, D-Box Collection Box 23, "Edison
Files.
374 Ibid.
The development the Edicraft line kitchen appliances was effort regain
some the consumer market that the Edison phonograph had lost the late
1920s.
worked room the rear the building one group offices
established the 1920s. 4,” 5.375
112
. This was developed Building
4 and finally introduced 1926.372 likely that the two latter activities took
place Building 4.440/106, neg.373 The experiments long playing records
would have used the pressing equipment and recording facilities set in
Building 4.
375 See photographs 12. J. nos. 8098 through 8102, Photograph Album
43, catalog 751 (not reproduced for this report). Thomas Edison Jr
