2 results containing "Diagrams--1940-1950."
This diagram shows where the water of the Central Valley comes from and where it goes - out to sea through the Golden Gate
 | 1 photomechanical print
Illus. in HD1694.C2 D4 [General Collections] | LC-DIG-ppmsca-17727 (digital file from book illustration)
Two see each other by wire as they phone--conversations and images transmitted perfectly over new television apparatus
[194-?] | 1 photographic print.
SSF - Television and television broadcasting <item> [P&P] | LC-USZ62-101897 (b&w film copy neg.)