i 1886]. m ww Pyoccedinge of Scientific Societies. 
November 11th: 
Peas Pies eae: jo the mad = Hee sey conducted by F. W. 
Put Sa: am; 
Dra orial photographs, by 
F C. “Pi m4 $ ate ee enh Pritchard's wide She eter by C. 
Young; The ctestiod a barometer exposure, e onstruction 
of new tables of Satu G. V ill; On the relation of the Green Mounta 
rock: aconic, by R. Pumpelly; Hard d ch ya Be in 
solids, by T. Ste erry Hunt; On wind as a seed-carrierin relation ne of the most 
difficult problems in geographical distribution, by Alfred Russell. Wallace. . 
The sessions were held in the Institute of Technology. On. 
Wednesday evening, November roth, the academy was enter- 
_tained at the house of General Francis Walker, president of the 
_institute., 
BIOLOGICAL Society oF WASHINGTON, Oct. 30, 1886.—Com -1 A 
munications: Mr. Wm. H. Seaman, Notes on Marsilia quadrifolia; 
` Dr. Theo. Gill, The characteristics of tæniosomous fishes. 
Nov. 13.—Communications: Dr. Filip ee of Stockholm, 
Recent progress in zoology in Sweden; Mr. J. W . Chickering, Jr.. 
Travels in Alaska; Mr. Wm. H. Dall, Histories! notes on the de- 
partment of the U. S. National Museum | 
New York ACADEMY OF SCIENCES, Oct. 18, 1886.—The follow- 
ing paper was read: Earthquakes: what is known and believe 
=> about them by geologists, by Professor John S. Newberry. 
2 Oct. 25.—The following paper was read: Notes on the geology 
of Block apee ‘and Nantucket, by Mr. F. J. H. Merrill. 
N —The subject of earthquakes and volcanic action 
formed ee basis of a discussion, supplementary to the paper o | 
Oct. 18. f 
Nov. 8.—The following paper was presented: A limit to the 
a Ton of atmosphere, by Dr. Henry A. Mott. | 
Nov. 15.—The following paper was presented: Recent investi- 
_ gations on the mitigation of pathogenic Bacteria (with illustra- 
tions by the lantern and microscope), by Mr. C. E. Pellew. 
-= Nov. 29.—Professor Albert R. Leeds, of the Stevens Institute 
rof Tes, read his paper on the purification of water supplies, 
_ announced for the 22d, and unavoidably postponed. 
Boston Soctery or NATURAL H ISTORY, Oct. 6, I 886. —At the 
slates forming the outer ridges. 
Professor Wm. T. Sedgwick exhibited some apparatus ara 
devised at the Institute of Technology for elementary tea 
