XXIV Trans. Acad. Sci. of St. Louis. 
April 18, 1910: 
Frank Mrsker.—China, and the Great Wall. 
May 2, 1910: 
Cuartes A. Topp.—The Preservation and Mounting 
of Wet Preparations for Museums. 
Francis H. Nrpper.—The Nature of the Electric Dis- 
charge. 
(Published in Transactions of The Academy of Science 
of St. Louis, Vol. XIX, No. 4, 1910.) 
May 16, 1910: 
Witu1am Trevease.—The Geographical Distribution 
of Agave in the West Indies, and its Probable 
Mode of Introduction. 
June 6, 1910: 
Water Epwarp McCovurr.—The Unfolding of the 
Map of the World. 
October 17, 1910: 
Wi11am TrevEAsE.—The Smallest of the Century 
Plants. 
(Published in Popular Science Monthly, December, 1910.) 
J. L. Van Onnum.—The Effect of the Presence of 
Vegetable Mold on the Strength of Concrete and 
Mortar. 
November 21, 1910: 
JuLtius Hurtrer.—The Poisonous Snakes of Missouri. 
December 5, 1910: 
Uxtricno Harper.—Evolution with Reference to the 
Acquisition of the Erect Posture, its Disadvan- 
tages and the Decline of Certain Faculties in 
Man. 
December 19, 1910: 
Rosert J. Watuace.—The Construction, Equipment 
and Work of a Modern Observatory. 
