EQUIPMENT 



that I used. It was necessary to install a stronger spring while on ship- 

 board, which illustrates the importance of carrying a few metal working 

 tools and supplies. 



No provision was made for winding, changing focus or diaphragm. 

 Control, therefore, is similar to that of the motion picture machine. 



Before closing the subject of equipment, attention is called to two 

 important items which should be on board:— an adequate emergency kit 

 for injuries, and a pamphlet describing methods approved by the Red 

 Cross for treatment of persons rescued from drowning. The manager 

 of every diving expedition ought to familiarize himself with this first-aid 

 treatment and he should compel his friends and employees to do likewise. 



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