126 Transactions Texas Academy of Science. 
5. “The Effect of Tension on the Development of Mechanical Tissues 
in Plants/* 0. M. Ball, Ph. D., Professor of Botany and Mycology, Agri- 
cultural and Mechanical College, College Station. 
March 24, 1904. 
Herbert Spencer Memorial Meeting. Addresses by Drs. Henry 
Winston Harper, Thos. H. Montgomery, Jr., Warner Fite, and Professor 
W. S. Sutton. 
Formal Meeting June 8, 1904. 
1. Two new lecture experiments: 
(1) “Dependence of Chemical Equilibrium and Velocity of 
Reaction Upon the Relative Concentration of the Components 
(Influence of Mass) Shown With Acidified Solution Mixtures 
of Potassium Iodine^ Iodine, Potassium Ferrocyanide and 
Potassium Ferricyanide.** 
(2) “Demonstration of the Measurement of Single Potential 
Difference/* Dr. Eugene P. Schoch, Instructor in Chemistry 
in the University of Texas. 
2. “Instincts and Habits Illustrated by Solitary Wasps/* Carl G. 
Hartman, M. A., Tutor in Zoology in the University of Texas. 
3. “Character and Growth of Population in Texas/* Judge Z. T. 
Fulmore, Austin. 
4. “Representative Lists of the Vertebrate Fauna of Texas/* (By 
Title), Frederic William Simonds, Ph. D., D. Sc., Professor of Geology 
in the University of Texas, Austin. 
October 21, 1904. 
Presidential Address: “The Social Sciences,” Dr. Milton Brockett 
Porter, Profesor of Mathematics in the University of Texas, Austin. 
December 2, 1904. 
“What Should Be Done By the University for the Professional Edu- 
cation of Teachers ?** William S. Sutton, M. A., Professor of the Science 
and Art of Education in the University of Texas, Austin. 
