12 Journal of the Mitchell Society [September 



mediate characters of great variation, especially in regard to cork 

 cambium, demonstrating that anatomical characters are inherited as 

 well as the ones of color, size, weight, etc., usually studied. 



Wild Ferns and Flowers of Chapel HiU. H. R. Totten. 



The Department of Botany, with the assistance of the classes in 

 Botany 1 and 2, brought in wild plants found in flower during the 

 first week in May. These were put on display for two days, so that 

 the botany, students and others interested in our native plants could 

 familiarize themselves M-ith them. One hundred and seventy-one 

 plants were displayed in flower. This number includes thirty-four 

 naturalized weeds and fourteen escapes. The Virginia Spiderwort 

 (Tradescantia virginiana) and the White Bladder Campion (Silene 

 alba) have not been previously reported from Chapel Hill. Not 

 included in the number given above were several plants not in com- 

 plete flower, also tweWe ferns and one of the fern allies. 



The Calcium Content of Mixed Feeds in Bclation to the Feeding 

 Requirement of Animals. J. 0. Halverson and L. M. Nixox, 

 Dr. Forbes and associates of the Ohio Agricultural Experiment 

 Station showed that in heavy milking cows there is an actual short- 

 age or loss of calcium from the body. Perhaps a higher calcium con- 

 tent of mixed feeds for animals under domestication is necessary. 

 Concentrated dairy feeds require a somewhat higher, more carefully 

 regulated calcium content. The addition to mixed feeds relatively 

 low in calcium of such high calcium-containing sul)stances as alfalfa 

 leaf meal, meat, and ground bone to poultry and hog feeds, and beet 

 ]nilp, alfalfa meal, or calcium carbonate to dairy feeds, is a com- 

 mendable and beneficial practice. Actual intensive feeding practice 

 strengthens this belief. Recent work on the importance of the mineral 

 elements in nutrition has shown that they are fundamentally neces- 

 sary in the growth of farm animals as well as in the animals of the 

 laboratory; that they are as necessary in the ration as is a protein 

 of both adequate quality and quantity. 



Studies on Fermentation of Bare Sugars by Plant Pathogenic Bac- 

 teria. F. A. Wolf. 



Organisms from the same host may be indistinguishable on the 

 basis of their ability to ferment the carbohydrates of the Descriptive 

 Chart. The fermentation of rare sugars has, therefore, been used as 



