Letter from John V. Atanasoff to R. M. Bowie of the Hygrade Sylvania Corporation regarding the purchase of vacuum tubes, June 19, 1940. The letter discusses an order of vacuum tubes that were shipped as well as the work that is being done on the computing machine.
Letter from John V. Atanasoff to R. M. Bowie of the Hygrade Sylvania Corporation regarding the purchase of vacuum tubes, July 23, 1940. The letter details a request from Atanasoff about vacuum tubes he needs to build his computing machine.
Letter from John V. Atanasoff to N. B. Krim of the Raytheon Production Corporation regarding the purchase of vacuum tubes, May 21, 1941. The letter details the type and number of tubes that Atanasoff needs to complete his computing machine.
Letter from John V. Atanasoff to N. B. Krim of the Raytheon Production Corporation regarding the purchase of vacuum tubes, July 23, 1940. The letter details the number of tubes and the voltage Atanasoff needs to complete his computing machine.
Letter from John V. Atanasoff to R. M. Bowie of the Hygrade Sylvania Corporation regarding the purchase of vacuum tubes, May 21, 1941. The letter details a request from Atanasoff for help in filling the need for vacuum tubes to be used in the construction of his computing machine.
Letter from John V. Atanasoff to R. M. Bowie of the Hygrade Sylvania Corporation regarding the purchase of vacuum tubes, January 4, 1940. The letter details the construction of a computing machine Atanasoff is building with the assistance of Mr. Berry and an inquiry about receiving a better price on vacuum tubes.
Letter from John V. Atanasoff to R. D. Holt of the Cinch Manufacturing Corporation regarding the purchase of socket plugs, March 13, 1940. The letter details an inquiry into what would be the best type of socket plug to use in conjunction with the vacuum tubes to construct the computing machine.
Letter from John V. Atanasoff to G. D. O'Neill of the Hygrade Sylvania Corporation regarding a paper on vacuum tubes, July 26, 1941. The letter details Atanasoff appreciation for a copy of O'Neill's paper titled The Effects of Contact Potentials on Vacuum Tube Characteristics and it's helpfulness in the construction of the computing machine.
