CONTENTS. 
TARE OP CONVENES eo A 
ee Oe PCN oe ee ee eee 
List oF Mempers. Revised to February 28, 1920...... 
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2. 
3. 
Papers PUBLISHED. 
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PatTRONS, 
Honorary MEmMpBERs. 
ACTIVE MEMBERS. 
Puiu Rav anp Neuure Rav.—Longevity in Satur- 
niid Moths and Its Relation to the Function of 
Reproduction.—Plates I-V.—Issued December 
Mee AE EI iw PFC ERR 
Mary J. Kiem.—The History of Science in St. 
Louis.—Issued December 29, 1914.......... 
WiLuiAM TRELEASE.—The Agaveae of Guatemala. 
—Plates VI-XXXV.—Issued July 15, 1916.. 
Francis E. NipHer.—Disturbances Impressed 
upon the Earth’s Magnetic Field.—Gravita- 
tion and Electrical Action Plates XXXVI- 
XLIV.—Issued July 28, 1916............. 
Francis E. Niruer.—Gravitational Repulsion.— 
Plates XLV-XLVII.—Issued November 8, 
REE es bas Ce Aa oe oe a NE A 
Francis E. NipHer.—Graphical Algebra In- 
volving Functions of the Nth Degree.—Issued 
iS ae NeE 2 2 | poneange Mae Grergegeer he tage enamine papier megan 
Francis E. NipHer.—Graphical Algebra.—Is- 
SUC BURR 1s 5 5 Ces ke oh ee ees 
Harry Harris.—Birds of the Kansas City Re- 
gion.—Issued February 27, 1919........... 
. Francis E. Nipuer.—A Study of the Properties 
of Integral Numbers.—New Evidence of a 
Relation Between Gravitation and Electrical 
Action and of Local Changes in the Electri- 
cal Potential of the Earth.—Issued March 2, 
1 
January 1, 1914, to February 28, 1920: 
153 
Lit 
372 
