100 MORPHOLOGY, ETC., OF VASC. PLANTS [Bot. Absts. 



682. Holmes, Arthur D. Digestibility of some by-product oils. U. S. Dept. Agric. 

 Bull. 781. 16 p. 1919.— "The coefficients of digestibility of the by-product oils (98.4 per 

 cent for apricot-kernel, 98 per cent for cherry-kernel, 9S.2 per cent for cantaloupe-seed, 96.6 

 per cent for peach-kernel, 98.2 per cent for pumpkin-seed, and 95.8 per cent for tomato-seed 

 oil) indicate that these oils are very well assimilated by the [human] body and possess a nutri- 

 tive value equal to that of other better known edible oils, such as cottonseed, corn, peanut, 

 cocoanut, soybean, and olive ois.l" — Author's summary. 



683. Hotr, I. P. [Chinese.] [Plant oils in China. 1 Khu-Shou [Science, a publication 

 of the Science Society of China] 4: 321-325, 448-459. 1919.— Seventeen different plant oils 

 are briefly discussed as regards chemical composition, physical properties, and uses in China. 

 Descriptions of the plants, as well as their distribution, are included, together with methods 

 of extraction of oils (in some instances). — D. E. Lee. 



684. Johnson, James. The influence of heated soils on seed germination and plant growth. 

 Soil Science 7: 1-103. PI. 1-8. 1919— See Bot. Absts. 3, Entry 854. 



685. McHatton, T. H., and H. W. Harvey. Peach growing in Georgia. Georgia State 

 Coll. Agric. Bull. 169. 32 p., 11 fig. 1919. — History of Prunus persicd in Georgia with general 

 cultural and handling directions. Commercial varieties recommended, Mayflower, Greens- 

 boro, Carman, Waddell, Hiley, Belle, Elberta and Fox.— T. H. McHatton. 



686. Pickett, B. S. Some soil treatments for mature apple orchards. Illinois Agric. 

 Exp. Sta. Circ. 233. 6 p., 8 fig. 1919. — The cultivation, mulching, and fertilizing the soil 

 in old apple tree orchards are discussed and the benefits therefrom emphasized. — M. J. 

 Pfnfiha. 



687. Prescott, Edward E. The Australian flora from an ornamental aspect. Jour. Dept. 

 Agric. Victoria 17: 183-187, 242-245. PI. S. 1919.— A description of the ornamental plants 

 of Australia is given. — /. J. Skinner. 



688. Wallis, E. Pear growing in Victoria. Jour. Dept. Agric. Victoria 17: 76-86, 

 207-216. PI. 16. 1919— See Bot. Absts. 3, Entry 869. 



689. Zee, T. N. [Chinese.] [Some ancient works on agriculture.] Khu-Shou [Science, 

 a publication of the Science Society of China] 4: 269-273. 1918. 



MORPHOLOGY, ANATOMY AND HISTOLOGY OF VASCULAR 



PLANTS 



E. W. Sinnott, Editor 



690. Campbell, Douglas Houghton. Mosses and ferns. 3d ed. 8vo, 708 p. Mac- 

 millan Co.: New York, 1918. — New edition revised and brought up to date, includes 

 investigations based on collections of tropical liverworts and ferns, especially from the Indo- 

 Malayan region. A large appendix, taking into account the more recent investigations in 

 the field covered by the book, has also been added. — E. W. .Sinnott. 



691. Engler, Arnold. Tropismen und excentrisches Dickenwachstum der Baume. 

 Ein Beitrag zur Physiologie und Morphologie der Holzgewachse. [Tropisms and eccentric 

 thickening in trees. A contribution to the physiology and morphology of woody plants.] Preis- 

 schr. Stiftung Schnyder von Wartensee 21: 1-106. 14 pi., 16 fig. Beer and Co.: Zurich, 

 1918. — Detailed field notes and stem analyses bearing upon the general form and eccentricity 

 of trees growing on steep slopes and in other abnormal positions, with special reference to 

 heliotropism, geotropism, and the effects of longitudinal compression upon the cambium. 

 The author concludes that there is very little difference between the structure of the so-called 



