In the Instrumentation Laboratory of the AG-76 AVERY ISLAND Mr. 

 A. H. Waite, Jr., of the Radioactivity Measurement Section, checks the 

 timing of an automatic pen-and-ink recorder. Such recorders were 

 used on support ships to make permanent records of data gathered 

 by automatic instruments on "hot" target ships. Several of the Geiger 

 counters on the target ships v/ere employed in such telemeter system; 

 readings were broadcast automatically to recorders on support ships 

 stationed several miles from Bikini Atoll. The permanent records ob- 

 tained were available for immediate use, or for more detailed analysis 

 at a later time. Such data were of especially great importance in 

 evaluating Test B, the underwater explosion. 



Plate 16 



