754 EXPERIMENT STATION RECORD. 



to the long-leaf pine region, is of commercial importance in but 7 States, viz, Alabama, 

 Florida, Georgia, Louisiana, Mississippi, North Carolina, and South Carolina. The 

 development of the industry and methods of gathering the rosin, and the preparation 

 of the various products, are descril)ed at some lenjfth. 



The increase of the forest domain of Belgium (Rei\ Enux et Forcts, 40 {1001), 

 Xo. :?0, pj>. 630, 631). — Since 1897 the forest domain of Belgium has been increased 

 by 2,847 hectares at a cost of 2,761,727 francs. In 1900 and 1901 the extension 

 amounted to 1,768 hectares, of which 826 were high forest and coppice, 82 coppice, 

 613 coniferous forest, and 242 uncultivated or abandoned lands. 



Forest fires in Gascony, Millies-Lacroix {Lesincendies dans lesforcts de pinsdes 

 landes de Gascogne. Paris : Mouillot, 1901, pp. 70). — A discussion of proposed legisla- 

 tion regarding forest fires in the pine forests of Gascony. 



The forest, its influence and manag'enient, F. W. Card {Rhode Island Sta. 

 apt. 1901, pp. 1^5-353) . — A popular paper on forest influences and forest manage- 

 ment. 



The treatment and manageraent of forests, particularly of deciduous 

 trees, L. Boppe {Rev. Eau.r et Forets, 40 {1901), No. 15, pp. 449-455). — The author 

 calls attention to various methods whereby the management of forests may be 

 improved so as to provide increased returns. 



Forest improvement. An outline of lectures with numerous references, 

 R. Hess {Die Forstbenutzung. Fin Grundriss zu Vorlesungen mit zahlreichen Littera- 

 furiKii-lnrelsen. Berlin : Paul Parey, 1901, pp. XV + 318) . 



Experiments in thinning, Schwappach {Allg. Forst w. Jagd/Ag., 67 {1901), June, 

 pp. 198-302).~^he principles of forest thinnings are discussed and various ap])lica- 

 tions in practice pointed out. 



Annual revie^v of the publications and more important events in forestry, 

 forest zoology, agricultural chemistry, meteorology, and forest botany for 

 the year 1900 {Allg. Forst n. Jagd 7Ag., 67 {1901), Sup., pp. 5.?j.— Lists of publica- 

 tions, reviews of articles and works, and accounts of important events in the depart- 

 ments indicated are given. 



SEEDS WEEDS. 



The seed coats of certain species of the genus Brassica, A. J. Pieters and 

 Vera K. Charles ( V. 8. JJepl. Agr., iJiciKion of Botany Bui. 29, pp. 19, pi. 1, Jigs. 6). — 

 A study was made of the seeds of different species of Brassica to ascertain if possible 

 how to distinguish certain valualjle high-priced seeds from those which are less 

 valuable or worthless weed seed. The external appearance and gross anatomy of 

 the seeds of 7 species of Brassica are discussed and the histological characters are illus- 

 trated and described at considerable length. A brief key is given for determining 

 the seeds of the species studied. This key is l)ased upon the charac-ters mentioned 

 above. 



The action of concentrated sulphuric acid upon seed, particularly upon 

 the hard seeds of certain Leguminosae, F. Todaro {Staz. Sper. Agr. Ital., 34 

 {1901), No. 7, pp. 61.3-6S9). — On account of the desirability of increasing the ger- 

 mination of hard seed, which often occur in great numbers among leguminous seed, 

 and for the treatment of beet and other seed to hasten their germination and to 

 destroy fungus spores that may have found lodgment upon the seed bolls, the author 

 conducted an extended series of experiments on the effect of sulphuric acid when 

 applied to a great variety of seeds of leguminous and other plants. He found that 

 concentrated sulphuric acid of a density of 1.84 acted upon hard seeds of all legu- 

 minous plants, rendering them capable of prompt germination. Hard seeds of various 

 leguminous species were found to withstand immersion in concentrated sulphuric 

 acid, without any injury to their viability, for about 1 hour at a temperature of 25 to 



