BULLETIN OF THE UNITED STATES FISH COMMISSION. 150 



any accident to the original one. Except occasionally adjusting the 

 brushes, the running of the dynamo requires but little attention, and 



Fig. 3. 



both the engine and dynamo are run by enlisted men in the Engineer 

 Department. 

 The wiring has required but little attention ; in several places the deck 



Fig. 4. 

 leaked and the salt water short-circuited but there have been no serious 

 mishaps. The trouble from this cause, however, has resulted in the de- 



