412 
IOWA ACADEMY OF SCIENCE Voi. XXVII, 1920 
N 
New York, See Waters, Soft. 
Nitrogen and Other Compounds in Rain and Snow, Jacob E. Triesch- 
mann and Nicholas Knight 159 
O 
Okefinokee Swamp, Georgia, Biological Reconnaissance of, The 
Fishes, E. E. Palmer and A. H. Wright 353 
Okoboji, See Cladocera, Copepoda, Rotatoria, Vegetation. 
Oregon, See Blanco, Cape. 
P 
Palmer, E. Laurence, and Wright, A. H., Biological Reconnaissance of 
Okefinokee Swamp, Georgia: The Fishes 353 
Pammel, L. H., Address of, at Calvin Memorial 27 
Pammel, L. H., Memorial of H. R. Werner by 35 
Pammel, L. H., and Cratty, R. I., Some Plants of the Arapahoe Na- 
tional Forest and Rocky Mountain National Park 51 
Pammel, L. H., and King, C. M., Germination of Some Trees and 
Shrubs and their Juvenile Forms 75 
Parker, Ralph L., Relative Position of Maxima Contractions of Am- 
phibian Muscle When Subjected to Various Ranges in Temperature. 311 
Pathology, Plant, Teaching of, W. H. Davis 81 
Peck, Morton E., Vegetation of Cape Blanco 85 
Phase Difference, See Binaural Phase Difference. 
Photographic Plate, See Blackening Curve. 
Prairie, Cultivated, Intensive Ornithological Survey of Typical Square 
Mile of, A. R. Abel 385 
Psychological Laboratory of State University, Current Research in. 
Symposium, Introduced by C. E. Seashore 227 
R 
Rain and Snow, See Nitrogen. 
Ralston, F. Paul, See Geauque and Ralston. 
Ream, Merrill J., A standardized Measure of Motility 238 
Reymert, Martin L., Personal Equation in Motor Capacities 233 
Robinson, B. W., Selection of Talent for Stenography and Typing 236 
Rocky Mountain National Park, Some Plants of. See Arapahoe. 
Rotatoria of Okoboji Region, Dwight C. Ensign 271 
Rudnick, R. A., and Bakke, A. L., Mechanical Penetration of Sweet 
Corn Pericarp 129 
S 
Seashore, C. E., Results of Current Research in Psychological Labor- 
atory of State University 227 
Sea-Urchin Egg, Dividing, Susceptible and Resistant Phases of. When 
Subjected to Various Concentrations of Lipoid- Soluble Substances, 
Especially the Higher Alcohols, F. M. Baldwin 287 
Shimek, B., Address of, at Calvin Memorial 29 
Shumaker, J. B., See Knight and Shumaker. 
Sieg, L. P., Photographic Determination of Form of Airplane Loop 
and Dynamics of the Loop 207 
