TARGET. Personal and laboratory accounts, Feb 1880-Jan 1881. Entries include dynamos, telephones, ore milling, dynamo building, [what is "direct converter? See fr. 309, 329ff, 352], lamp factory, clamp machine, vac pumps, electric brake & tramway, Corning glass, harmonic dynamo (fr 379). FRAME 403 IS TARGET FOR ACCOUNTS FROM JAN 1881 TO 1888. Early 1881 is more of the same; NY office accts.,
[AB002-F] Account Series -- Personal and Laboratory Accounts
https://edisondigital.rutgers.edu/document/AB002
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 87