April, 1930) BOTANICAL EDUCATION 133 



910. Ayres, W. E. Cultural experiments with cotton. Arkansas Agric. Exp. Sta. Bull. 

 161. 16 p., 4 pl- 1919.— Results in value of seed cotton per acre are given to Bhow the returns 

 from various methods of handling cotton. The following methods are tabulated and com- 

 pared: Check-row spacing; check-row vs. ordinary spacing; thinning vs. no thinning; number 

 of plants per hill; distance between hills; width of rows; ridge vs. level planting; dates of 

 planting; methods of cultivation ; bopping. The results are given for the season of 1918. The 

 use of the double-row cultivator with the elimination of three-fourths of man labor gave prom- 

 ising results. — John A. Elliott. 



911. Taylor, W. H. Bees and flower fertilization. New Zealand Jour. Agric. 18: 203. 

 1919. — Discusses the subject with reference to beans and peas. — E. R. Hodson. 



912. Kajanus, Birger. Uber eine Kreuzung zwischen zwei Typen von Sommerweizen. 

 [On the crossing of two types of spring-wheat.] Bot. Notiser 1918: 245-247. 1918.— See Bot. 

 Absts. 3, Entry 1007. 



913. Werner, H. O. Grading legislation in Nebraska. Potato Mag. l u : 24. 1919. — 

 Describes bill which compels grading of potatoes produced in Nebraska. — Donald Folsom. 



914. Probasco, C. B. Suggestions on marketing potatoes. Potato Mag. l u : 11, 24. 1919. 

 — Advocates fixed standards, growers' associations, and establishment of demand for specially 

 marked packages. — Donald Folsom. 



915. Wheeler, H. J. Fertilizers stimulate production in Maine. Potato Mag. l u : 30. 

 1 fig. 1919. 



916. Clinton, G. P. Prematuring and wilting of potatoes. Potato Mag. l u : 12-13, 24. 

 1919— See Bot. Absts. 3, Entry 1162. 



917. Sanborn, C. B. Oklahoma and certified seed. Potato Mag. 1": 23. 1919. 



918. Murphy, P. A. Seed potato inspection service in Canada. Potato Mag. I 10 : 8, 28, 

 31. 7 fig. 1919. — Describes methods and effects of inspection. — Donald Folsom. 



919. Barrus, M. F. Seed improvement and certification. Potato Mag. I 10 : 10, 25, 34. 

 / fig. 1919. — Discusses scope, methods, and results in the United States. — Donald Folsom. 



920. Clark, C. F. The potato industry in Colorado. Potato Mag. 1": 8-9, 22; l 12 : 14-15, 

 29. 8 fig. 1919. — Describes the various districts, the importance of the crop, variety choices, 

 range of soils, rotation and other cultural methods, storage, pests and diseases. — Donald 

 Folsom. 



BOTANICAL EDUCATION 



C. Stuart Gager, Editor 



921. Fairchild, David. Present condition and opportunity of the American Genetic 

 Association. Jour. Heredity 10: 65-67. 1919. — See Bot. Absts. 3, Entry 994. 



922. Wakeman, Nellie. Teaching plant chemistry. Jour. Amer. Pharm. Assoc. 8: 105- 

 108. 1919. — Three lines of thought are presented, (1) the value of the subject; (2) materials 

 for study; and (3) methods of presenting the subject. The paper deals with the methods of 

 teaching plant chemistry at the University of Wisconsin. — Anton Hogstad, Jr. 



923. Tansley, A. G. The reconstruction of elementary botanical teaching. New Phytol. 

 18: 10S-110. 1919.— The editor closes the discussion begun in December, 1917. "The sug- 

 gestion that the syllabus of an elementary course, on the lines indicated in the memorandum, 

 should be drawn up and published has been made from several quarters. In accordance 



