IOWA ACADEMY OF SCIENCES. 
9 
At the literary sessions the following papers were 
presented: 
The Presidential address, “Two Centuries of North American Lich- 
enology. ’ ’ — Bruce Fink . 
‘ ‘The Animal Cell in the Light of Recent Work. “—Gilbert L. Houser. 
‘ ‘The Action of Chloric Acid on Metals.” — W. S. Hendrixson. 
“The Importance of Vital Statistics in the Study of Social Science,” — 
Gershom H. Hill. 
“A Buried Peat Bed and Associated Deposits in Dodge Township, Union 
County.”— T. E. Savage. 
“Some Notes on Iowa Flora.” — L. H. Pammel. (Illustrated with 
lantern slides. ) 
“Some Features in the Analysis of Dolomite Rock. ”— Nicholas Knight. 
‘ ‘The Softening of Hard Water.”— Nicholas Knight. 
‘ ‘Some Bacteriological Examinations of Iowa Waters.”— L. H. Pammel, 
Edna King, R. E. Buchanan. (Illustrated with lantern slides ) 
“The Determination of Chlorides by Means of Silver Chromate.” — 
Launcelot W. Andrews. 
“A Chemical Study of Rhus glabra.” — Arthur W. Martin. 
“The ‘ Furcula’ in the Collembola.”— J. E. Guthrie. 
“The Sioux City Water Supply.”— Alfred N. Cook. 
, “A New Deposit of Fuller’s Earth.”— Alfred N. Cook. 
‘ ‘The Flora of Emmet County, Iowa.— R. I. Cratty. 
‘ ‘Action of Sodium Thiosulphate on Silver Salts.” — W. M. Barr. (Intro- 
duced by W. S. Hendrixson.) 
‘‘Regeneration in the Crayfish.” — John J. Lambert. (Introduced by 
Gilbert L. Houser. ) 
“Stereoscopic Projection in Natural Colors.” — C. F. Lorenz. (Intro- 
duced by A. A. Veblen.) 
“Notes on the Position of Nileus vigilans in Strata at Elgin, Iowa.” — 
G-. E. Finch. 
“A Contribution to our Knowledge of the Development of Prunus Ameri- 
cana.” — R. E. Buchanan. 
“Additions to the Iowa Flora.”— B. Shimek. 
“The So-called Dorsotrachealis Branch of the Seventh Cranial Nerve in 
Amphiuma. ” — H. W. Norris. 
“The Vagus and Anterior Spinal Nerves in Amphiuma. ”— H. W. Norris. 
“The Lichen Flora of the ‘Ledges,’ Boone County, Iowa. ” — KatyA. 
Miller. (Introduced by Bruce Fink.) 
“A Method of Determining Chloric Acid.” — W. S. Hendrixson. 
“Periodical Literature in Iowa on the Subject of Chemistry . ”— W. S. 
Hendrixson. 
“A Geological Situation in the Lava Flow, with Reference to the Vegeta- 
tion.” — Harriet M. Clearman. 
“A Synthesis of Ethyl Alcohol from Acetylene.” — John C. Frazee. 
(Introduced by C. O. Bates.) 
“New Method of Cohesion of Water and Adhesion of Mercury Apparatus.” 
— Edwin Morrison. (Introduced by H. W. Norris.) 
