March, 1920] HORTICULTURE 99 



vidual. The length of spikes and culms was the same in both categories. In all 43 normal 

 and 19 female plants were secured, which indicates a monohybrid segregation (calculated, 

 46.50 : 15.50). Also in the next general ion nude individuals were found among the few plants 

 which came to flower. — K. V. Oaaian Dahlgren. 



672. Woods, Frederick Adams. Portraits of early Americans. Jour. Heredity 10: 

 212-222. Fig. 13-18. May, 1919. 



HORTICULTURE 



J. H. Gocrley, Editor 



673. Andas, J. \Y. The cultivation of chicory. Jour. Dept. Agric. Victoria 17: 113-116. 

 Fig. 2. 1919. — Method of cultivation practised for chicory (Cichorium intybus) are given. 

 The seeds are planted in September and roots dug in March. — J . J. Skinner. 



674. Andas, J. W. An economic plant. The Jerusalem artichoke. [Helianthus tuber- 

 osus.j Jour. Dept. Agric. Victoria 17: 246-248. Fig. 1. 1919. — The artichoke is suitable 

 to a variety of soils, its cultivation and economic value is discussed, and its composition 

 given. — J. J. Skinner. 



675. Berry, James B. Trees, their use and abuse. Georgia State Coll. Agric. Bull. 

 162. 19 p., 18 fig. 1919. 



676. Chase, W. W. Common insects and diseases of the apple. Georgia State Bd» 

 Entomol. Bull. 54. 51 p., 12 pi., 22 fig. 1919— See Bot. Absts. 3, Entry 748. 



677. DaRrow, George M. Currants and gooseberries. U. S. Dept. Agric. Farmers' 

 Bull. 1024. 40 p., 26 fig. 1919. 



678. Farrell, J. Apple culture in Victoria. Jour. Dept. Agric. Victoria 17: 145-157. 

 PI. 6. 1919.— See Bot. Absts. 3, Entry 758. 



679. Free, Montague. Effect of low temperatures on greenhouse plants. Brooklyn 

 Bot. Gard. Rec. 8: 14-17. Jan., 1919. — Gives experience of Brooklyn Botanic Garden con- 

 servatories during the unusually severe winter of 1917-1918, accompanied by abnormal 

 shortage of coal. — C. S. Gager. 



6S0. Gunderson, A. J. The pruning of winter-injured peach trees. Illinois Agric. Exp. 

 Sta. Bull. 218: 383-394. Fig. 1-13. 1919.— The extent of winter injury of peach trees and 

 the factors affecting severity of injury are discussed. The experimental work was confined 

 to 3, 4, and 5-year old, winter-injured Elberta peach trees. The trees were pruned with 

 varying degrees of severity and observations were made as to the effect of such pruning on the 

 growth and on the bud formation. Moderate pruning gave best results. — M. J. Prucha. 



681. Hollingshead, R. S. Chemical analyses of logan blackberry (loganberry) juices. 

 U. S. Dept. Agric. Bull. 773. 12 p. 1919. — "The juices of berries growm in Washington and 

 Oregon differ markedly in composition from those of fruit produced in California. There is 

 also a very large variation in the composition of juices from fruit grown in the various parts 

 of these states. This is probably due to the fact that in the northern section the berries are 

 grown under heavy rainfall, whereas the land in California usually is irrigated. Apparently 

 California juices have a somewhat higher ash content and a lower acid content than the juices 

 from the more northern states. Observations extending over several seasons would, of course, 

 be necessary to confirm this apparent difference." — Author's summary. 



