FORESTRY. 971 



door garden culture. This book is the thirteenth of the serli-s of Ihuidlioolvs of 

 Practieal (iardening, edited ))y II. Roberts. 



A new design of greenhouse {Amrr. A(/r., 71 {I'lO.i), Sn. 14, p. 391, figs.' 2). — 

 One of the peculiarities of this greenhouse is the i-urved eave line. There is no eave 

 plate and no gutter. lUustrationH are given of the interi<ir and exterior of the 

 house, which was built at Briarcliff, New York, in 1901. 



Horticulture in Egypt, L. Saunders (Jour. Rmj. U,,rl. Sur. [LdihIou], J7 [1902), 

 Xii. 2-S, pp. 629-6o,J). — An account of ri'cent development along horticultural lines 

 in i<^gypt. 



FORESTRY. 



The principal species of wood, their characteristic properties, ('. H. 8xow 



(Nai) York: Juliii Wilri/ <_{■ S<iii.^, lOOii, jij). X]'I \ JO.l, pl.'<. .Jt),fi<j.-<. JO) .—T\nti]H)ok, which, 

 as the author says, is not designed primarily for foresters, botanists, or engineers, 

 but for all the users of wood who desire knowledge regarding their distinguishing 

 properties, gives in untechnical terms the principal features which characterize the 

 economically important species of wood. The necessary terms used are first defined, 

 after which the structure, methods of growtli, and appearance in different sections of 

 woods are described. The differences in wood that distinguish tlie greater sub- 

 divisions are pointed out, after which the species are described under appropriate 

 groupings. In many cases the species are grouped under their generic names, or a 

 number of nearly related forms are brought together. The distribution, structural 

 and physical properties, commercial features, and l)otanical characteristics are first 

 described for the genera, after which the leading species are considered in detail. 

 Of the more than 120 species of timber described, most of them are indigenous to the 

 United States, although a few of the more important exotic species are included. 

 The illustrations, which are a highly commendable feature of the work, show the 

 general aspect of the tree and a large section of the trunk, the grain characteristics 

 of the wood, and in many instances the leaf and fruit in detail. Of the 15.5 figures 

 that go to make up the plates nearly all are original, and reproduction is well done. 

 The publishers have presented the work in an attractive form, and this book will 

 doubtless be found useful for students as supplementing the technical works on 

 l)otany and forestry, as well as giving desired specific information regarding our 

 more important tindaer trees. 



Applied ecology, B. E. Fernow [Sciemr, 11. aer., 11 {1903), No. 433, pp. 605-607). — 

 After giving the definition of ecology the author proceeds to discuss it from its silvi- 

 cultural relations. This is done in the hope of stimulating observations which will 

 aid in solving some of the perplexing problems of the practical forester.. According 

 to the author, the silvicultural factors may be divided into 2 classes, those which are 

 stable and the varial)le ones. The stable factors are soil and general or local climate, 

 while the unstable ones are seasonal variations, plant and animal associates, and 

 light. These different factors are discussed at some length and the hope expressed 

 that others will take up and i)ursue the suljject, particularly that relative to light 

 and shade. 



A study of the redwood, II. T. Fisher ( U. S. Dept. Agr., Bureau of Forestry Bui. 

 38, pp. l-'JS, ph. 9, dgms. ,v^).— This study is made more with reference to the young, 

 second-growth redwood than to the mature trees. The author claims that redwood 

 reproduces itself abundantly by sprouts on cut-over land and occasionally by seed; 

 that in 30 years in a fair soil and a dense stand it will produce trees 16 in. in diameter 

 and 80 ft. high, yielding 2,000 ft. B. M. per acre. On account of this rapid repro- 

 duction, after careful lumbering it will i)ay to hold cut-over redwood lauds for future 

 crops. 



The redwood described is ,Sriiuoli< .^rmj^-rrimis. Its distribution through California 

 and into Oregon is indicated, and the climatic conditions re(iuired by the tree are 



26240— No. 10— 03 4 



