Smithsonian Report. 1964. — Cowan 



Plate 6 



1. A view of the interior of one of the large Hquid scintillation tanks before mounting the 

 photomultipliers in the end. A plexiglass sheet seals off the end forming a chamber which 

 will contain the tubes. The thin, corrugated, stainless-steel top for the tank is seen 

 resting behind it. 



2. Exterior view of the end of a scintillation tank after mounting photomultipliers. The 

 tube mounts and bases are seen protruding from the end. After wiring the bases into a 

 circuit, a steel box cover was bolted in place over the end. 



