Record. Xxili 
May 18, 1908: 
LinpLEy Pyte.—Measurement of the Acceleration of 
a Freely Falling Body. 
June 1, 1908: 
S. A. Doventass.—The Electric Furnace in Industrial 
Chemistry. 
October 19, 1908: 
A. S. Lanesporr.—Fatigue of Insulation. 
(Published in Electrical World, Vol. LII., Oct., 1908.) 
November 2, 1908: 
H. M. Wuewtptey.—Cranial Surgery among the 
Primitive Races. 
November 16, 1908: 
E. J. Swrrr.—How We Learn to Do Things. 
(Published in “Mind in the Making,” Scribners, 1908.) 
December 21, 1908: 
J. N. Basxetrt.—Heads and Tails in Nature. 
January 4, 1909: 
C. A. Watpo.—What a Volcano is Doing. 
January 18, 1909: 
Won. H. Rorver.—Optical Interpretation of Some 
Problems in Statics. 
February 1, 1909: 
Gustav Baumcarren.—The Personality of Engel- 
mann. 
H. A. Wueeter.— Engelmann’s Contribution to 
Geognosy. 
F. EK. Nipper.—Engelmann’s Work in Meteorology. 
Wo. Trevease.—Hingelmann as a Biologist. | 
February 15, 1909: 
S. M. Coutrer.—Darwin as a Naturalist. 
W. E. McCovurt.—Darwin’s Influence upon Geology. 
J. F. Assorr.—The Natural Selection Theory and 
Its Latter Day Critics. 
