FORESTRY. . 739 



Gradiska, Austria. The results as a whole indicate thus far that chemical 

 f(>rtilizers not only are remunerative but also are necessary in order to attain 

 the desired production from the vineyards. 



Plant culture, U. \V. Oliver {New York, 1909, 2. ed., rev., pi). 308, figs. 103).— 

 This is offered as a working liandbook of everyday practice for all who grow 

 flowering and ornamental plants in the garden and greenhouse. The methods 

 described are based upon the many years' experience of the author. Specific 

 directions are given for the x-ulture of various types of plants, including stove 

 and greenhouse plants, bedding plants, vase and basket plants, vines (hardy 

 and tender), bulbous, water, and hardy perennial plants, as well as hardy 

 shruas, ornamental grasses, ferns, and lycopods. A section at the end of the 

 work is devoted to general directions, including propagation, hybridization, pot- 

 ting plants, soils, nnilching, and watering. 



Dahlia growing- made easy, J. G. Lockley {Sydney [1909], pp. 128, figs. 

 30). — A brief popular treatise, in which consideration is given to the history of 

 dahlias, detailed cultural operations, types, exhibiting and judging. A monthly 

 working plan is also suggested, together with several lists of the best dahlias 

 of various types. 



The orchid stud-book, R. A. Rolfe and C. C. Hurst {Kew, 1909, i)p. 

 XLVIII+327, figs. 122). — This work is intended as a guide to the literature of 

 orchid hybridization and as a standard of nomenclature. It contains an enu- 

 meration of hybrid orchids of artificial origin, with their parents, raisers, date 

 of first flowering, references to descriptions and figures, and synonymy, together 

 with a historical introduction and a chapter on hybridizing and raising orchids 

 from seed. The text is fully illustrated. 



New refrigeration car, K. Guenther {Daily Cons, and Trade Rpts. [U. &'.], 

 1909, A'o. 3566, p. 7). — This is a brief descriptive note on a new type of refrig- 

 erator car recently invented in Germany. Methyl chlorid is used for producing 

 cold. It is claimed that at a speetl of 2.5 miles per hour and at 20° C. tempera- 

 ture of the external air, the interior of the car can be reduced to 0° in 40 or 

 45 minutes. 



FORESTRY. 



studies on the basic principles and the systematics of the science of for- 

 estry, L. Wappes {t<ttidi<'n iiher die Gniiidhegriffe iind die Sy-steniatiic der Forst- 

 tcissensehaft. Berlin, 1909, pp. 73). — In the opinion of the author, what is 

 to-day known as the science of forestry can not lay claim to being a science, 

 either on the score of the tield it covers or on its systematic arrangement. 

 The studies here reported, and which have been under way for many years, 

 represent the author's attempt to build up a science of forestry on definite 

 basic principles and to develop a systematic arrangement of all scientific 

 forestal investigations. The subject matter is discussed under the following 

 general headings : The conception and contents of scientific forestry, the 

 organic system of forestal discipline, and forestry and the state. 



The status of forestry in the United States, T. Cleveland, .Jr. ( U. S. Dept. 

 Agr., Forest Serv. Cire. 167, pp. 39).— In this circular the author outlines the 

 p'resent forest situation in the United States and gives an account of the work 

 beilig done by the National Government and by the States to conserve their 

 forests as well as of the advance l)eing made in the practice of forestry by 

 private owners of timberlands and woodlots. An appendix to the circular con- 

 tains a classified list of the i)ublications of the Forest Service, the location and 

 area of national forests and a list of the schools of forestry. 



Forest conditions in Ohio, W. .7. (Jreen and E. Skhi.st (Ohio Sin. Hid. 20.',, 

 pp. 237-277, figs. //).— This l)ulU'tin consists of a report of a preliminary 

 l.">140— No. 8— Oy 4 



