102 



THE AVOODSMAN S HANDBOOK. 



The observer inserts the fingers of his left hand into the loop of 

 leather straps attached to the back of the hypsometer, with both 



Fig. 10.— Method of sij^'hting with standard hypsometer. 



straps inside of the hand and the instrument (Mi the hack of the 

 fingers. Closing the hand enables him to grusp the straps firmly. 



