HORTICULTURE. 441 



spraying, picking, packing, and marketing. Tlie subject matter is based in part 

 on the autlior's experience in orcliardiug on rough lauds. 



Sugg'estions on the storage of apples, E. Walker (Arkansas 8ta. Circ. 13, 

 pp. -{). — A popular presentation of the principles involved in keeping fruit and 

 in the management of storage houses. 



An index to illustrations of pears, E. A. Bunyard {Jour. Boy. Hort. Soc. 

 [London], 37 {1911), No. 2, pp. 321-349).— As with the index of apples pre- 

 viously noted (E. S. R., 26. p. 238), the present index comprises an alphabetical 

 list of pears, vpith references to the illustrations appearing in publications of 

 various countries. 



The avocado in Hawaii, J. E. Higgins, C. J. Hunn, and V. S. Holt (Ilaioaid 

 Sta. Bui. 25, pp. 4S, pis. 7, figs. 13). — ^A popular treatise on the culture of the 

 avocado in Hawaii dealing with its botany and history, natural reqviirements, 

 cultural requirements, control of injurious insects and diseases, crop statistics, 

 harvesting, and marketing. Information is also given relative to methods of 

 breeding the avocado and its use as food, including methods of serving and 

 preserving the fruit. The better known trade varieties, together with varieties 

 under test on the mainland of the United States and varieties of special merit 

 under test at the Hawaii Station, are described. 



The subject matter is based largely on the results of investigations conducted 

 at the station for the past 2 or 3 years. 



On some natural citrus hybrids, L. Savastano and A. Parrozzani {Reprint 

 from Sta.z. Agrum. e Frutticol. [Acireale], 1 {1911), pp. 37-63, pi. 1). — ^This 

 comprises a study of several natural citrus hybrids with special reference to 

 persistence of type. A number of hybrids, including a lemon X orange, lemon X 

 lime, and an orangeXlime, are described, and analyses are given of several 

 samples showing their content in sugar and acid. 



The sugar and acid content of the hybrid forms was found to be much more 

 variable than that of the cultivated orange, lemon, and lime. It is concluded 

 that the hybrid types are so inconstant as to be of little value as cultivated 

 varieties. 



A bibliography relating to citrus fruits is appended. 



Mottled leaf not spread by budding', J. E. Coit {Pacific Rural Press, 83 

 {J 912), No. 2, p. 29, fig. 1). — In a budding experiment, here briefly reported, the 

 author found that selected bud wood from trees of the Eureka lemon and 

 Valencia orange, which were badly mottled owing to partial chlorosis, did not 

 transmit this mottling when budded on healthy sweet stocks. On the other 

 hand, the bud wood was so diseased that only a small percentage of the buds 

 grew. The author does not recommend the use of such bud wood for propa- 

 gating citrus trees. 



Pruning and training the grape, F. E. Gladwin {New York State Sta. Circ. 

 16, pp. 8, p/s. 4). — This circular comprises brief general considerations relative 

 to pruning and training grapes, and describes the methods of training the vines 

 according to the various systems in common use. 



Enological studies. — The chemical composition of American grapes grown 

 in Ohio, New York, and Virginia, W. B. Alwood ( U. S. Dept. Agr., Bur. Chcm. 

 Bui. lJf5, pp. 35). — This summarizes the results of a 3-year investigation of the 

 chemical composition of the principal commercial varieties of American grapes 

 grown in the central and eastern sections of the country, including a number of 

 varieties not generally cultivated. The samples grown in Ohio and New York 

 were analyzed at Sandusky, Ohio. The tabular data for the 3 seasons, 1908 to 

 1910, show the name of variety and locality in which grown, number of samples 

 and growers, the Brix reading, and the average, maximum, and minimum total 



