2 FT. BRASS PIPE, l" 1.0. 



RUTISHAUSER HEAD WITH 

 DIAPHRAGM REMOVED 



BRASS CASING 



BAKELITE INSULATING DISC 



ANIMAL MEMBRANE TUBE 



CENTRAL ELECTRODE 



MINERAL OIL 



0.002" THICK, T'EFFECT DIAM. 

 BRASS DIAPHRAGM 



WATER 



-j- I.D. BRASS TUBES 

 4 



FLATTENED SECTION 



■i"* rr OPENINGS 

 2 64 



V'f— I 



(FULL SIZE) 



FIGURE II- SECTION OF VELOCITY- MEASURING INSTRUMENT 



38 



