FIFTEENTH ANNUAL REPORT 125 



of hake, whitebait and herring for fish-food. Aquatic plants of 

 several kinds were also brought in from time to time for exhibi- 

 tion and for aerating the balanced aquaria. 



FISH-HATCHERY 



Through the kindness of the United States Bureau of Fish- 

 eries, the Tuxedo Club of New York, and the Blooming Grove 

 Hunting and Fishing Club of Glen Eyre, Pa., all of whom have 

 supplied us with fish eggs, we have been able to keep the model 

 fish-hatchery in operation for a considerable part of the time. 

 The following species have been exhibited in process of hatching : 

 whitefish, steelhead trout, blackspotted trout, brook trout, quin- 

 nat and Atlantic salmon and yellow perch. The last mentioned 

 were supplied through the efforts of our collector from Wading 

 River, Long Island and Charlottesburg, N. J. The output of the 

 hatchery, except such as we have retained for exhibition pur- 

 poses, has been distributed by the New York Forest, Fish and 

 Game Commission. 



ASSISTANCE TO TEACHERS AND INVESTIGATORS 



As in former years, we have continued to stock balanced 

 salt-water aquaria with water, small animals and plants for the 

 public schools, whenever called upon and the large laboratory 

 room on the second floor has been open to teachers with their 

 classes until recently for the purpose of studying the animals and 

 plants in the balanced aquaria. Since we were compelled to 

 make use of this room for administration purposes it has been 

 necessary to exclude the public altogether. However, a number 

 of the balanced aquaria have been put on exhibition in the bal- 

 cony, and space for a cloak room for the use of visiting classes 

 has been provided in the lower office. Professor Jacques Loeb 

 of the Rockefeller Institute, has been supplied with certain mate- 

 rial for research, and Mr. G. G. Scott of the College of the City 

 of New York has been able to make use of our limited laboratory 

 space to carry on investigations on the blood of fishes. 



ATTENDANCE 



A considerably larger number of visitors made use of the 

 Aquarium during 1910 than in any previous year except 1909. 

 The unusually large attendance of that year must be attributed 

 in part to the great influx of visitors to the city in connection 

 with the Hudson-Fulton Celebration. While the attendance for 

 1910 did not reach that for 1909; it was some 500,000 larger 



