1917J HORTICULTURE. 641 



The identification and classification of pears, G. Luizet {Jour. Soc. Nat. 

 Hort. France, 4. ser., 17 {1916), May, pp. lIt-18; ahs. in Internat. Inst. Agr. 

 [Rome'], Internat. Rev. Sod. and Pract. Agr., 7 {1916), No. 8, pp. 1119, 1120).— 

 An outline is here given of a scheme for identifying and classifying pears 

 that has recently been worked out by L. Chasset and is to be published in 

 full at a later date. 



Origin and development of hardy, blight-resisting pears, C. G. Patten 

 (Minn. Hort., 45 {1917), No. 3, pp. 97-102, pi. 1, figs. 2).— A popular review of 

 the work of the author and other investigators in the attempt to secure hardy, 

 blight-resisting pears for culture in the United States. 



The cherry and its industrial culture, A. A. Hinzenbukg (Vishnfa i eia 

 Promyshlennaia Kultura. Petrograd: Imp. Ross. Obshch. Plod., pts. 1 {1914), 

 pp. lOS, figs. 48; 2 {1915), pp. Ill, figs. 65).— Part 1 of this work deals with the 

 description and classification of cherries, together with various cultural op- 

 erations. Part 2 takes up the diseases and pests of cherry trees and methods 

 of control. The methods of harvesting and packing cherries and the prepara- 

 tion of various cherry products are also considered. 



Variations of a sexual hybrid of the vine by grafting it on one of its 

 procreators, F. Baco {Compt. Rend. Acad. Sci. [Paris], 163 {1916), No. 23, pp. 

 712-714). — In continuation of previous studies on variations in grafted grape- 

 vines (E. S. R., 29, p. 148), the author here reports a case in which a hybrid 

 when used as a scion changed its mosaic and general appearance and assumed 

 latent characters of the stock and of one of its maternal ancestors. 



The hybrid direct bearers in the valley of the Rhone in 1916, A. Dks- 

 MOXiLiNS and V. Villaed {Prog. Agr. et Vit. {Ed. VEst-Centre), 38 {1917), Nos. 

 2, pp. 36-42; 3, pp. 59-62).— In continuation of previous data (E. S. R., 35, p. 

 41), observations are given for the seventeenth year relative to the behavior 

 of a large number of hybrid direct-bearing grapes, with special reference to 

 their resistance to disease, adaptation to various soil conditions, and relative 

 time of budding. 



Blueberry culture, Elizabeth C. White {Woman's Nat. Farm and Gard. 

 Assoc, 3 {1917), No. 3, pp. 3-10). — The author describes in detail methods em- 

 ployed in preparing a piece of swamp land for blueberry culture and in the 

 propagation and planting of selected wild blueberries. The work was con- 

 ducted at Whitesbog, N. J., in cooperation with the U. S. Department of Agri- 

 culture (E. S. R., 35, p. 647). 



Fertilizer experiments with cranberries in 1916, P. P. Schlatter {Proc. 

 Amer. Cranberry Growers' Assoc., 47 {1917), pp. 13-16). — A summary of results 

 secured in 1916 in cooperative experiments being conducted under the direc- 

 tion of the New Jersey Experiment Stations (E. S. R., 34, p. 834). 



The results of the work thus far secured indicate that sandy bogs respond 

 favorably to fertilizer treatment, but that it is unwise to apply fertilizers in 

 any great amount to muck bottom bogs, with the possible exception of those 

 fertilizers carrying phosphorus. 



The continued increased yield in sandy laud in 1916 is attributed to the 

 residual effect of fertilizer, since none of the plats were fertilized since 1915. 



Progress in vegetative propagation of tropical fruits, P. J. Wester {Philip- 

 pine Agr. Rev. [English Ed.], 9 {1916), No. 3, pp. 257, 258).— The author gives 

 brief directions for the propagation of a number of species of tropical fruits. 

 The directions are based upon work conducted at the Lamao Experiment 

 Station. 



History of the avocado and its varieties in California with a check list 

 of all named varieties, I. J. Condit {Mo. Bui. Com. Hort. Cal., 6 {1917), No. 

 1, pp. 1-21, figs. 5). — In addition to brief historical notes on the avocado in 



