TWENTY-THIRD ANNUAL REPORT 93 



The guide will be a pocket-size book of about 175 pages, with 

 a good half-tone cut at the top of each page. It will contain brief 

 accounts of 350 of the fishes and other aquatic forms most fre- 

 quently to be seen there. Had it been issued when first proposed, 

 it could not have been anything like as comprehensive in 

 character, 



A Book of ViewK. — This pamphlet, entitled Inmates of the 

 Aiiuarium, has been on sale since August, 1916. It is appre- 

 ciated by the public and more than half of the edition of 5,000 

 copies has been sold. 



Attendance. — A few months after the beginning of the war 

 in Europe the record of attendance showed that the number of 

 visitors to the Aquarium was falling off. This decrease contin- 

 ued to the end of the present year, except for a slight increase 

 in 1917. The attendance for 1918 was 1,450,609, a decrease of 

 144,509 from that of the preceding year, and the lowest in the 

 history of the Aquarium. The lessened number of visitors, how- 

 ever, is indicated by the attendance record only, there being no 

 noticeable decrease in the size of the throng in the building from 

 day to day. The daily average for the year was 3,964. 



ATTENDANCE AT THE AQUARHJM BY MONTHS, 1918. 



January visitors 



February " 



March " 



April " 



May " 



June " 



July " 



August " 



September " 



October " 



November " 



December " 



Total " 1,450,609 " " 3,964 



Record of monthly mean temperatures and specific gravities 

 at the New York Aquarium during the year 1918 (from daily 

 observations made by Mr. W. I. DeNyse).* 



*Density ()l)sfr\atii>ii.s weri- iiiailc with saiii})lc.s of water brought to a tem- 

 perature of (50° Fahr. 



