PROCEEDINGS OF THE THIRTY-FOURTH 
ANNUAL SESSION 
Held at Iowa City, April 23 and 24, 1920 
The meetings of the thirty-fourth annual session of the Academy were 
held in Physics Hall at the State University. The session was called to 
order by President Stephens at one o’clock Friday afternoon. After the 
preliminary business meeting the exercises in connection with the pre- 
sentation of the Calvin Memorial Portrait were held and the president 
then gave the Annual Address, on the subject of The Taxonomic Unit. 
Following the presentation of papers the Academy adjourned to the 
Englert Theatre where Professor Nutting showed the motion pictures of 
the University Barbados-Antigua expedition of 1918. Dr. Farr then ex- 
hibited a film showing the penetration of potatoes by the fungus Pythium 
De Baryanum. At 9:00 o’clock, after the usual dinners and a short pro- 
gram, the Academy attended a reception given by President and Mrs. 
Jessup at their home. 
On Saturday morning following the sectional programs the final busi- 
ness session was held. Provision was made for the selection of an 
editorial committee, for the details necessary to complete affiliation with 
the American Association for the Advancement of Science and for the 
revision of the constitution. 
REPORT OF THE SECRETARY 
Members of the Iowa Academy of Science: 
The past year has been one of steady growth for the Academy, as is 
witnessed both by the new members who have joined our society and 
by the continued high quality of our programs. The Academy is to be 
congratulated on the widespread interest which is taken in it by its 
membership, and it is probably not too much to say that this interest 
is responsible for the enviable position which our Academy holds among 
similar organizations of the United States and for the excellent reputation 
which it enjoys. Some of you read the article in Science (N. S., Vol. 
L, Dec. 5, 1919) on State Academies of Science by President David D. 
Whitney of the Nebraska Academy. You will recall that the tables there 
presented showed that among the strictly state Academies Iowa ranked 
first both in membership and in publications. They also showed that all 
of the sciences were well represented in our Academy. For convenience 
of reference the information contained in these tables is given below 
retabulated. 
