Depressor 



The depressor is described in Appendix I and shown on 

 Figure 3 . 



Instrumentation 

 The instrvnnentatio n consisted oft 



1. A Bourns Model 304, miniature gage-pressure 

 transducer which converts pressure into an 

 electrical output by moving a wiper contact 

 linearly across a precision wire-wound poten- 

 ti^neter; 



2. A bridge circuit for the Bourns gage, designed 

 to permit reading of gross pressure and fluc- 

 tuations about a selected gross pressure; 



3. A two-channel Brush recorder. Model Mark II; 

 and 



4. A 20,000-poiind-capacity direct-reading Dillon 

 dynamometer . 



Handling Equipment 



The handling equipment consisted of five major components i 



1. A conventional stern sheave, approximately five feet 

 in diameter; 



II. 5 



