Smithsonian Report. 1941 .— Lawrence 



Plate 



1. The first base plate being placed on the concrete foundation. The plate is 52 feet long, 75 inches wide, 

 and 2 inches thick, and weighs 13H tons. There is about 1,200 tons of reinforced concrete in the founda- 

 tion. 



2. The lower core of the magnet prior to placing of the final pole face. The diameter of the pole face is 184 

 inches, and the gap between the poles will be 40 inches. 



Progress pictures of the New Giant Cyclotron at Berkeley, Calif. 



