Program. 39 
9. Mental Defectives; the Problem; Conditions in Indiana, 20 minutes— 
Miss Edna R. Jatho, Psychologist, Philadelphia Public Schools. 
10. Textbook Treatments of Diffusion and Osmosis, 15 minutes—Paul 
Weatherwax, Indiana University. 
CONTINUATION OF GENERAL SESSION, FOLLOWED BY 
SECTIONAL MEETINGS. 
FRIDAY 2:00 P.M AND SATURDAY 9:30 A.M. 
Bacteriology. 
11. Number of Colonies for a Satisfactory Soil Plate—H. A. Noyes and 
G. L. Grounds, Agricultural Experiment Station, Purdue Uni- 
versity. 
12. The Length of Time to Incubate Petri Plates—H. A. Noyes, J. D. 
Luckett and Edwin Voigt, Agricultural Experiment Station. 
Purdue University. 
13. Bacteria in Frozen Soil—H. A. Noyes, Agricultural Experiment 
Station, Purdue University. 
Botany. 
14. Reproduction in Coleochaete Scutata, 8 minutes (lantern)—M. S. 
Markle, Earlham College. 
15. Some Abnormalities in Plant Structure, 2 minutes—M. S. Markle, 
Earlham College. 
16. Plants of Boone County, Kentucky (by title)—James C. Nelson. 
17. Plants New or Rare to Indiana, VIII, 10 minutes—Chas. C. Deam, 
Acting State Forester. 
18. The Morphoiogical Basis of Certain Problems in Inheritance in 
Maize, 12 minutes—Paul Weatherwax, Indiana University. 
Chemistry. 
19. Analysis of 100 Soils in Allen County, Indiana—R. H. Carr and 
V. R. Phares, Purdue University. 
20. Relation of Nitrogen, Phosphorus and Organic Matter to Corn Yield 
in Elkhart County, Indiana—R. H. Carr and LeRoy Hoffman, 
Purdue University. ; 
21. Flame Reactions of Thallium, 10 minutes—Jacob Papish, Purdue 
University. 
22. Sulphur Dioxide as a Source of Voleanic Sulphur, 5 minutes—Jacob 
Papish, Purdue University. 
