110 NEW YORK ZOOLOGICAL SOCIETY 



were prepared by Dr. R. C. Osburn. The March number re- 

 lated entirely to the subject of small home aquaria and proved 

 to be of unusual interest to the public. It was reprinted by the 

 Scientific A7nerican. The edition offered for sale at the Aqua- 

 rium was soon exhausted, and will be re-issued with additions 

 as a pamphlet of the New York Aquarium Nature Series. The 

 sale of the various Aquarium numbers of the Bulletin has 

 amounted to 1,720 copies during the year. 



Neiv York Aquarium Nature Series. — An account of the 

 Northern Elephant Seal, published in Zoologica (scientific con- 

 tributions of the New York Zoological Society), Chameleons of 

 the Sea, published in the Century Magazine, and The Cultivation 

 of Fishes i7i Natural and Artificial Ponds, printed in the annual 

 report of the Zoological Society, all by Director Townsend, have 

 been re-issued as pamphlets of the New York Aquarium Nature 

 Series. 



The sale of all of these, including the first of the Nature 

 Series, Sea-Shore Life by Dr. A. G. Mayer, has been a source of 

 profit to the Aquarium Privilege Account. 



A series of colored post-card views of the Aquarium and 

 its collection issued in January, 1912, has also proved a source 

 of profit. 



The total receipts from the sale of publications during the 

 year amounted to $1,084.10. 



Record of Monthly Mean Temperatures and Specific Gravi- 

 ties of the waters of New York Harbor at the Battery. Daily 

 observations made by W. I. DeNyse at the New York Aquarium 

 during the year 1912. 



Temperature 



of water Specific Gravity 



January 38 1016 



February 36 ..: 1017 



March 38 1013 



April 43 : 1010 



May 50 1011 



June 58 1014 



July 66 1016 



August 68 1017 



September 68 1017 



October 64 1017 



