1-iG. 92. {upper) A laboratory photograph of a viperfish {Chaitliodin) , ot which 1 saw, 

 from the bathysphere, a school of seven at a depth of 1700 feet. Fig. 93. {lotver) The most 

 delicate part of the operation of the descent is the paying out of the solid rubber hose con- 

 taining telephone and electric light wires. This must not be bent or rubbed, and every 100 

 feet is fastened to the wire cable with a rope tie. 



