![Arc of Empire: The Federal Telegraph Company, the U.S. Navy, and the Beginnings of Silicon Valley | Business History Review | Cambridge Core Arc of Empire: The Federal Telegraph Company, the U.S. Navy, and the Beginnings of Silicon Valley | Business History Review | Cambridge Core](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary-alt:20170803103503-75079-mediumThumb-S0007680517000630_fig3g.jpg?pub-status=live)
Arc of Empire: The Federal Telegraph Company, the U.S. Navy, and the Beginnings of Silicon Valley | Business History Review | Cambridge Core
![Workmen at Federal Telegraph smoothing two castings for 80-ton magnets. The tall central pole had to be machined down for use in the cyclotron. Morgue 1944-45 (P-1) [Photographer: Donald Cooksey] - NARA Workmen at Federal Telegraph smoothing two castings for 80-ton magnets. The tall central pole had to be machined down for use in the cyclotron. Morgue 1944-45 (P-1) [Photographer: Donald Cooksey] - NARA](https://cdn10.picryl.com/photo/2014/12/31/workmen-at-federal-telegraph-smoothing-two-castings-for-80-ton-magnets-the-131bd0-1024.jpg)
Workmen at Federal Telegraph smoothing two castings for 80-ton magnets. The tall central pole had to be machined down for use in the cyclotron. Morgue 1944-45 (P-1) [Photographer: Donald Cooksey] - NARA
![File:Federal-Telegraph-Companys-engineering-staff,-Palo-Alto,-ca.-1917.-Behind-them-is-the-first-of-six-500-kilowatt-arcs-built-for-the-US-Navy.jpg - FoundSF File:Federal-Telegraph-Companys-engineering-staff,-Palo-Alto,-ca.-1917.-Behind-them-is-the-first-of-six-500-kilowatt-arcs-built-for-the-US-Navy.jpg - FoundSF](https://www.foundsf.org/images/e/ea/Federal-Telegraph-Companys-engineering-staff%2C-Palo-Alto%2C-ca.-1917.-Behind-them-is-the-first-of-six-500-kilowatt-arcs-built-for-the-US-Navy.jpg)