SEEDS WEEDS. 371 



resjK'ct only by the red eedar. The principal uses to which the honey locust planta- 

 tion can be put are hedges, shelter belts, and ornamental plantations, the wood 

 being of comparatively little value. The honey locust is easily propagated, and for 

 extensive plantings sowing the seed in rows early in the sjiring and transplanting to 

 permanent situations is recommended. 



The culture and uses of the species of Eucalyptus ( West Indian BuL, 4 {1903), 

 No. :?, pp. 140-175). — This article contains an extended compilation from the Bureau 

 of Forestry Bulletin 35 (E. S. R., 14, p. 575), together with notes on the distribution 

 and growth of a number of species of Eucalyptus in Jamaica, Trinidad, St. Vincent, 

 Barbados, Dominica, and other parts of the British West Indies, and a list of the 

 species which are believed to be suitable for tropical conditions in that region. 



The redwood (Forestri/ and Irrtg., 9 {1903), No. 6, pp. 300-305, figs. 5). — In this 

 article a description is given of one of California's most valuable timber trees, the 

 data being largely compiled from Bureau of Forestry Bulletin 38 (E. S. R., 14, p. 971). 



The TJnalaska spruce plantation, B. Adams {Forestry and Irrig., 9 {1903), 

 No. 8, pp. 3S2-3S5, figs. 4)- — An account is given of an attempt made to establish a 

 spruce plantation near Unalaska. The trees were planted nearly a century ago and 

 have made only a very small amount of growth, and that only in sheltered portions 

 of the island. From the results of this limited plantation the author believes that 

 this part of Alaska is not adapted to timber growing. 



Bamboos in the United States, L. Harrison {Forestry and Irrig., 9 {1903), No. 8, 

 pp. 400-404,figs. 5). — An account is given of some of the cultural possibilities of bam- 

 boos, most of the information being drawn from Bureau of Plant Industry Bulletin 43 

 (E. S. R., 15, p. 249). 



Wood preservation, P. Dumesny ( Consermtion des hois. Paris: Bernard Tignol, 

 1902, pp. 35, figs. 3). — The author briefly describes some of the methods that are in 

 use for preserving timber against decay, rendering wood fireproof, etc. Considerable 

 attention is given to the effect of electricity in seasoning timber and as an aid to the 

 infiltration of timber with chemicals. 



Foreig-n trade of the United States in forest products, 1902, F. H. Hitchcock 

 ( V. tS. Dept. Agr., Division of Foreign Markets Bui. 33, pp. 72). — During the fiscal year 

 1902 there was imported into the United States $59,000,000 worth of forest products 

 and $49,000,000 worth was exported. A summary is given of the imports and 

 exports, the principal imports being gums of various kinds, lumber, cabinet woods, 

 dyewoods, wood pulp, and cork. The exports consist very largely of lumber and 

 timber, the combined shipment amounting to $36,000,000. In addition considerable 

 quantities of naval stores, wood pulp, tan bark, and charcoal are exported. 



SEEDS— WEEDS. 



The effect of light on seed germination, E. Heinricher {Bot. CentbJ,., Beiliefte, 

 13 {1902), p. 164; abs. in Bot. Centbl, 92 {1903), No. 10, p. :?0^).— The investigations 

 of the author show that light exerts a strong influence on the germination of seeds. 

 In some cases, as in Mesembrianthemum, Portulaca, and Stapelia variegata, the seed 

 germinates equally as well in light or darkness. In some other cases the seed will 

 sprout only in the dark, and seed of Piteaimia viaidifolia and Drosera. capensis will 

 germinate only in the light, those of the latter losing their germinative ability if 

 kept in darkness. The seed of many cacti are hastened in their germination by the 

 action of light. The effect of light upon the germination of seed of all the memljers 

 of a plant family can only be determined l)y repeated trials, since nearly related 

 species behave differently. 



Observations on the duration of the vitality of seed, J. Poisson {BhI. Soc. 

 Bot. France, 50 {1903), No. 5-6, pp. 337-354)-— -l^ review is given of considerable liter- 

 ature relating to the prolonged vitality of various species of seeds, and the author 



11776— No. 4—03 5 



