14 



PROCEEDINGS OF THE 



'' In order to obtain some definite data on the subject I sta- 

 tioned myself at a window facing to the south and counted the 

 birds as accurately as possible, as they flew over in detached 

 bunches or larger flocks. This counting was repeated for sev- 

 eral nights with the following results: 



Time. 



July 22. 



July 23. 



July 24. 



July 25. 



July 26. 



6.15 







3 



4 





6.20 



, , 





3 



2 



. . 



6.25 



, , 





318 



9 



16 



6.30 



15 





102 



11 



25 



6.35 



123 





41 



108 



115 



6.40 



125 



ii 



15 



576 



70 



6.45 



205 



433 



1 



87 



141 



6.50 



137 



248 





42 



311 



6.55 



23 



52 





2 



4 



7.00 



103 



. , 





, . 



. . 



7.05 



75 



. . 





. . 



. . 



7.10 



2 











Total .... 



808 



744 



483 



841 



682 



"It will be noted that the time of the flight was approxi- 

 mately the same except on July 24th which was a cloudy day 

 with more or less rain, all the other evenings being perfectly 

 clear. Evidently the amount of light influenced the time of 

 flight. 



' ' I verified the supposition that the birds were roosting at the 

 Asylum by visiting the grounds, where I located the birds in 

 an avenue of maples in the northern part of the west enclosure. 

 I likewise determined, by visiting the lower Schuylkill during 

 the time of flight on another evening, that the birds did not come 

 from there, but did apparently come from beyond Lansdowne, 

 the flight-line apparently crossing a little south of that place. 

 I left home on August 1st returning about the end of the month. 

 I at once took up my station to note the change in time of flight 

 and numbers of the Grackles, but not a Grackle did I see from 

 that time on, either flying over or about the Asylum grounds. 



