4 



CONTENTS. 



PAGE 



Table of Contents v 



List ok Members. Revised to Dec. 31, 1897: 



1. Patrons vii 



2. Active Members vii 



List of Exchanges. Revised to Dee. 81, 1897 xiii 



HiSTORT OF THE ACADEMT (Abstract) XXXV 



Record. July 1, 1894 to Dec. 31, 1897 xxxix 



Papers Published. July 1, 1894 to Dec. 31, 1897: 



1. R. Ellsworth Call. — A study of the Unionidae of 



Arkansas, with incidental reference to their distribu- 

 tion in the Mississippi valley. — Plates I.-XXI. — 

 Issued January 3, 1895 1 



2. Francis E. Nipher. — On the electrical capacity of bodies, 



and the energy of an electrical charge. — Issued 

 January 21, 1895 109 



3. H. A. Wheeler. — Note on the glacial drift in St. Louis. 121 



— Note on an occurrence of blende in lignite 123 



— Recent additions to the mineralogy of Missouri. — 



Issued February 21, 1895 126 



4. Francis E. Nipher. — The law of minimum deviation of 



light by a prism. — Issued December 20, 1895 133 



6. N. M. Glatfelter. — Relations of Salix Missouriensis, 

 Bebb, to S. cordata, Muhl.— Plates XXII.-XXIV.— 

 Issued January 4, 1896 137 



6. Charles Robertson. — Flowers and insects. Contribu- 



tions to an account of the ecological relations of the 

 entomophilous flora and the anthophilous insect fauna of 

 the neighborhood of Carlinville, Illinois. — Issued April 

 28, 1896 151 



7. Francis E. Nipher. — On a rotational motion of the 



cathode disc in the Crookes tube. — Issued May 8, 

 1896 181 



8. C. M. Woodward. — At what age do pupils withdraw 



from the public schools? — Issued May 21, 1896 185 



