October 31, 1890.] 



SCIENCE. 



CALENDAR OF SOCIETIES. 

 Philosophical Society, Washington. 



Oct. 25. — William Harkness, On the De- 

 termination of the Mass of the Moon from 

 the Tides; F. H. Bigelow, Some Suggestions 

 on Eclipse Photography and Eclipse Ap- 

 paratus. 



Natural Science Association of Staten 

 Island. 



Oct. 9.— William T. Davis, The Yellow- 

 Winged Sparrow (Ammodromus passerimis) 

 and a Black and White Creeper {Mniotilta 

 varia). The following objects, presented by 

 Mr. AVilliam Olliff, were shown: fragments 

 of a large decorated Indian pot, two celts or 

 skin-scrapers, and several examples of con- 

 ci'etions, all from Tottenville and vicinity. 

 A stone axe, found while digging a trench 

 for gas-pipe on Richmond Avenue, Clifton, 

 was presented by Mr. James W. Allen. Mr. 

 Thomas Craig showed plants of Lenina 

 trisulca, an addition to the flora of the island, 

 found in streams in the Clove Valley; also 

 Azolla GaroUniaiia from the same locality, 

 where it has evidently become thoroughly 

 established since its introduction there by 

 Mr. Samuel Henshaw in 1885. 



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