72 NOTES AND COMMENT 



Harold Dudley Clayberg. Physiographic ecology of Walloon Lake, Petoskey 



region. 

 WiNFiELD Scott Dudgeon. The morphology of Rumex crispus. 

 Enrique Eduardo Ecker. The pathogenic effect and nature of a toxin pro- 

 duced by B. Paratyphosus bacillus. 

 Wright Austin Gardner. The effect of light on the germination of seeds. 

 Ezra Jacob Kraus. Vegetation and reproduction, with special reference to the 



tomato (physiological and horticultural aspects). 

 Henry Reist Kraybill. Vegetation and reproduction, with special reference 



to the tomato (chemical aspects). 

 Wilfred William Robbins. Successions of vegetation in Boulder Park, 



Colorado. 

 Dean Humboldt Rose. Oxidase activity and chemical composition of healthy 



and diseased apple bark. 

 . Rial Catlin Rose. Conditions and microchemistry of germination of the 



seeds of Tilia, Sambucus and Rubus. 

 Mandayam a. Sampathkumaran. Stelar cambium and its derivatives. 

 Homer Cleveland Sampson. Chemical changes accompanying abscission in 



Colcus Blumei. 

 Warren Gookin Waterman. The development of root systems under dune 



conditions. 

 Bertram Whittier Wells. A survey of the zoocecidia of northeastern United 



States and Eastern Canada. 



University of Illinois 



Harry Warren Anderson. The yeast-like fungi of the human intestinal tract. 

 \/ Henry Granger Knight. Acidity and acidimetry of soils. 

 v' Newton Lyman Partridge. The effect of ventilation on apples in cold storage. 



Elmer Roberts. Fluctuations in a Mendelian character and selection. 



University of Michigan 



Clinton Albert Ludwig. The influence of illuminating gas and its constit- 

 uents on certain bacteria and fungi. 



University of Minnesota 



Donald Folsom. The experimental modification of Ranunculus under control. 



Frances Louise Long. The quantitative determination of photo-synthate in 

 relation to light in various species. 



Harvey Stallard. Secondary successions in the climax formations in north- 

 ern Minnesota, 

 w William Dorney Valleau. A study of sterility in the strawberry. 



University of Pennsylvania 



H. H. M. Bowman. Ecology and physiology of the red mangrove. 

 Franklin B. Carroll. Development of chasmagamous and cleistogamous 

 flowers of Impatiens fulva. 



