1897.] Proceedings of Scientific Societies. 361 
sometimes, if the action of the reagents has been only sufficient to fix 
the animals, they appear in Canada balsam like living animals. 
The same method, the author says, has given him perfect results with 
many infusorians, heliozoans and rhizopods, as well as with Hydra and 
other fresh water forms. With these animals, however, the narcotiza- 
tion is not necessary, but the osmice acid should be increased.—F. C. 
KENYON. 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
Boston Society of Natural History.—February 17, 1897.— 
The following papers were announced: Prof. N. S. Shaler, “ Subterran- 
ean Water of Southeastern New England ;” Dr.C. R. Eastman, “ On 
some Devonian Fish-beds of North America. 
March 3.—The following papers were announced: Mr. T. A. Jagger, 
Jr., “ Experimental Study of Mountain Building” (illustrated by mod- 
els); Mr. J. B. Woodworth, “ Geology of the Gay Head Cliff.” 
March 17.—The following paper was read: Mr. Frank Russell,“ An 
Account of a Naturalists Voyage down the Mackenzie.” —SAMUEL 
Hensuaw, Secretary. 
American Philosophical Society.— January 1, 1897.— Mr. 
Henry C. Mercer read a paper on “The Fossil Sloth of the Big Bone 
Cave, Tennessee.” 
February 19.—Prof. E. D. Cope presented a communication on 
“Some Paleozoic Vertebrates from the Middle States.” 
March 5.—Prof. Arthur W. Goodspeed exhibited some Recent Radio- 
graphs in comparison with the work of a year ago. 
University of Pennsylvania.—February 15, 1897.—Program 
Demonstrations : “Some Types of Insects Injurious to Vegetation,” Dr. 
S. C. Schmucker. Original Communications: “ Hatching of Dragon- 
fly Eggs,” Dr. Philip P. Calvert ; “ The Morphology of the Nucleolus,” 
Dr. T. H. Montgomery. Reviews: Drs. Macfarlane and Harshberger. 
March 1st.—Program Demonstrations: “ The Method of Measuring 
the Time of Mental Processes,” Dr. Lightner Witmer. Original Com- 
munications : “ Reaction Time of Americans, Indians and Negroes,” Mr. 
Albert L. Lewis. Reviews: “ Vertebrate Paleontology,” Dr. E. D. 
Cope; “ Physiological Chemistry,” Dr. M. E. Pennington ; “ Botany,” 
Dr. H. C. Porter.—H. C. PORTER, Secretary. 
