TWENTY-FIRST ANNUAL REPORT 129 



The working force rendered excellent service. As previously 

 stated, four of the large exhibition tanks were built during the 

 summer by our own men. Advantage was taken of the resigna- 

 tion of one attendant and of Mr. Chapman Grant, to increase 

 the compensation of all persons in the Aquarium receiving less 

 than $1,000 per annum, these raises being deemed urgent on 

 account of the increased cost of living. The vacant attendant's 

 position was not refilled, the other vacancy being refilled at a 

 lower rate of compensation. 



The Director takes pleasure in calling attention to the 

 cheerfulness and efficiency with which the employes have per- 

 formed the duties assigned to them. 



Miss Mellen has lettered, numbered and card-catalogued the 

 collection of Aquarium pamphlets and monographs, about 900 

 in all, and has in preparation an index of the entire library, con- 

 sisting of some 850 works, with special, separate indices' for 

 works in sets, such as the American Naturalist, 41 volumes; 

 Reports of the Massachusetts Fish Commission, 1868-1910, etc. 

 She has also indexed the collection of Aquarium photographs 

 taken by Mr. Sanborn and others from time to time and con- 

 sisting of about 950 prints arranged in 10 large, loose-leaf vol- 

 umes. Each volume now bears a label and a special index, and 

 there is, besides, a separate, general index, by means of which 

 any picture desired in any one of the 10 volumes may be turned 

 to immediately. 



AID TO SCHOOLS AND TEACHERS. 



During the year, small forms of marine life for stocking 

 school aquaria were supplied to 36 schools and colleges in Great- 

 er New York. Many teachers in the city schools bring their 

 classes to the Aquarium once a year. In 1916, there were 235 

 such classes accompanied by teachers, a total of 9,546. 



LABORATORY WORK. 



Dr. G. A. MacCallum continued his studies of the parasites 

 of fishes and prepared a second paper on the subject which was 

 published by the Zoological Society during the summer. 



Dr. Sergius Morgulis continued his investigations on nutri- 

 tion in fishes, under the auspices of the U. S. Bureau of Fisheries. 



