376 



Reports on Special Researches 



OBSERVATIONS ON CRUISE IV OF THE CARNEGIE. 1915-1916. 



(J. p. AuLT IN Command.) 



The Carnegie started from Brooklyn on her fourth cruise March 6, 1915, stopping first 

 at Gardiners Bay until March 9, to make her usual "swing observations," and arriving at 

 Colon, Panama, on March 24, 1915. She next passed through the Panama Canal; leaving 

 Balboa April 12, she sailed for Honolulu, arriving there May 21, 1915. She left Honolulu 

 on July 3, and arrived at Dutch Harbor, Alaska, on July 20, from which port she sailed on 

 August 4 for Port Lyttelton, New Zealand, arriving there November 2. Leaving Lyttelton 

 December 6, 1915, a cu'cumnavigation was made of the region between the parallels 50° 

 and 60° south, the Carnegie returning to Port Lyttelton on April 1, 1916. On May 17, 1916, 

 she again left Port Lyttelton bound for Samoa, Guam, and San Francisco. The cruise up 

 to April 1, 1916, is shown in Figure 19. 



m^ 



120' 



SO' 



60° 



Fig. 19.— Cniise IV of the Carnegie, 1915-1916 (April). 



On the completion of the work of Cruise III it was felt, as a result of the experience 

 gained, that the time had come when a more ambitious program of atmospheric-electric 

 work could be undertaken with hope of success, and to this end the atmospheric-electric 

 equipment was considerably increased. Also, a special atmospheric-electric house was 

 built aboard the vessel for the more permanent installation of the instruments. 



