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GYROSCOPE TYPE INCLINOMETER. Similar in 

 purpose to the pendulum-type inclinometer shown 

 on the preceding page is this gyroscopic instru- 

 ment. In this design the standard of verticality is 

 achieved not by a weighted bar but by electrically 

 driven gyroscopes. As in the pendulum-type in- 

 strument two complete units are mounted at right 

 angles, one to measure pitch, the other to measure 

 roll. Both these instruments were developed for 

 the Bikini tests at the Material Laboratory of the 

 New York Naval Ship yard. They are but single 

 examples of the total of 10,000 instruments used 

 to gather important data. 



