AND PERSONALITY 



To determine whether or not this formula found in the 

 north is an adaptation to cold, we studied the evidence 

 found in a member of the order Sirenia that lives in tropical 

 waters only. I refer to the manatee. 



The manatee feeds on sea grass. Sea grass is dependent 

 upon sunlight for its growth. Therefore it requires an all- 

 year-round warm climate and shallow water. Thus the 

 manatee not only is limited as to its habitat, but its tem- 

 perature habitat is the opposite of that of the whale; 

 and the shoaly habitat of the manatee protects it from 

 large and formidable enemies. Therefore, we expected 

 that a manatee comparable in size to a white whale would 

 have a smaller brain, a smaller heart, a smaller blood 

 volume, and a smaller thyroid gland. 



In our subarctic expedition we collected the energy- 

 controlling organs of whales that varied in weight from 

 764 to 1,217 pounds. Therefore, in. order to make a com- 

 parison, it was desirable to secure a manatee of comparable 

 weight. 



In Florida the manatee is protected by law, but through 

 the interest and cooperation of Mr. S. C. Murray permis- 

 sion was granted by Mr. G. W. Petersen, the conservation 

 agent, for us to secure one manatee. 



Through Captain Blair of the Goodyear dirigible 

 "Reliance," permission was also granted to Mr. Murray 

 for our party, consisting of Mrs. Crile, Dr. Quiring, Mr. Al 

 Pflueger, Mr. J. H. Kearns, and me, to observe manatees 

 from the air, in order to select one the size that we required. 



From the " Reliance," we were able not only to select the 

 manatee that we wanted, but so slowly does the manatee 

 move, that we were able to return to Miami and, in a 

 motor boat with the guidance of Captain Blair from 

 the air, identify and harpoon the manatee that we had 

 selected. 



This manatee measured 10 feet 3 inches and weighed 935 

 pounds. Compared with a 928-pound white whale, the 



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