THE BATHYSPHERE OF 1 9 34 245 



a shift was made on the barge to a larger generator and the 

 hght in the sphere operated at full voltage. 



Hose: The communication hose was the same 3000 foot 

 length used in 1930 and 1932, to which, by means of a 

 pressure and water proof splice, an additional 600 foot 

 length has been added. The hose contains four conductors, 

 two for electricity and two for telephones. These wires of 

 size 8 A and 14A respectively are suitably insulated, cabled 

 together and surrounded by a thick rubber wall, the outer 

 diameter of which is i.i 1 5 inches. 



Generators: During ninety-nine per cent of this year's 

 descents electricity was supplied by the old Kohler gen- 

 erator that was used before. This is an automatic plant 

 generating no volts direct current and of 1500 watts 

 capacity. It functioned perfectly during every descent. 

 Although the voltage of this plant at the surface was no, 

 this was reduced to 72 to 76 volts at the bathysphere by 

 the resistance of the 3600 feet of wire through which the 

 current passed. 



When stronger light was needed for photography the 

 larger generator was used in place of the Kohler. The volt- 

 age of the second generator could be controlled by a rheo- 

 stat above and by a voltmeter in the sphere, the amount of 

 current being regulated by directions given through the 

 telephones. 



Emergency Signaling Apparatus: Near the generator 

 and part of the electric circuit is a small box containing 



