SEEDS WEEDS. 453 



The yew trees of Great Britain and Ireland, .1. Love ( Loudon : Macmillan $• Co., 

 1897, pp. 2S6, ill.). 



Effect of wind on trees (Hard, and Forest, 10 (1897), No. 492, pp. 292, 293).— 

 Extracts are given of a paper by .1. B. S. Norton read before the St. Louis Academy 

 of Science on the effect of strong winds on trees. 



Electrical attraction of trees, R. G. ABBOTT (Curd, and Forest, 10 (1897), No. 492, 

 p. 297). — Notes investigations in France that tend to show the difference in resistance 

 of different kinds of trees. 



The rejuvenescence of old trees (Card, and Forest, 10 (1897), Xo. 494, pp. 311, 

 312, pis. 2, figs. 4.) — Editorial notes on the rejuvenescence of ;i large white oak tree 

 in the Arnold arboretum. 



Some Utah shade trees, F. ('. Sears (Card, and Forest, 10 (1897), No. 498, pp. 

 356,357). — Notes are given of Lombard v poplar, black locust, and box elder. 



SEEDS— WEEDS. 



The vitality of the common bindweed, J. H. Panton (Ontario 

 Agr. Col. and Expt. Farm Bpt, 1896, p. 7). — Brief notes are given on 

 experiments conducted for the eradication of the common bindweed 

 {Convolvulus arvensis). Early in the spring one plat was covered with 

 salt, another with gas lime, and a third sprinkled AAith a solution of 

 sulphuric acid, while a fourth was hoed as often as leaves appeared. 

 Several applications of gas lime and one of sulphuric acid were made 

 later in the season. An examination of the plats late in October showed 

 that where salt was used the plant was destroyed. With the gas lime 

 the weed was present only on the edge of the plat. The sulphuric acid 

 was found to be without effect, owing to the amount of lime existing in 

 the soil. The plat which had been hoed over almost daily showed a 

 tew small plants at the end of the season. 



The worst Canadian weeds, J. Fletcher (Canada Cent. I-J.rpt. 

 Farms Bui. :'8,2>p. 39, Jigs. Hi). — This bulletin discusses in a popular way 

 the eradication of weeds by summer fallowing, seeding down, and the 

 use of chemicals. Descriptions and illustrations are given of tower, 

 hare's ear, tumbling, and ball mustards, stinkweed, peppergrass, cow 

 cockle, bladder campion, orange hawkweed, viper's bugloss, hound's 

 tongue, Prussian thistle, curl dock, and Indian hay or sweet grass. A 

 list of the more prominent Canadian weeds, with their chief characters, 

 is appended. 



Seeds, G. Vestal (New Mexico Sia. Bui. JO, pp. 121-146). — A popular bulletin on 

 seeds, considered under the following heads : General remarks, testing seeds, process 

 of germination, improvement of crops by seed selection, occasional change of seed, 

 harvesting and storing seeds, length of time seeds retain vitality, destroying insects 

 in stored seed or grain, treatment of seeds for prevention of smut, amount of seed 

 required for sowing, etc. 



Report upon the best exotic seeds for introduction into temperate Europe, 

 A. Wesmael (J!apj)oris Preliminaires 3c Congres Intermit. d'Agr., Bruxelles, 1895, pp. 

 119-130). 



Beet seed culture, P. Doerstlixg (Die Riibensamenzucht. Berlin: E. Dreijer, 1897, 

 pp. 46, Jigs. 7). — A pamphlet on beet seed culture, giving its history and development 



