246 EXPERIMENT STATION RECORD. [Vol.40 



en Meded. Dir. Landb., No. 1 (1918), pp. 157, pis. 2). — A report of a survey of 

 the fruit industry in the part of Gelderland situated between the rivers Rhine 

 and Meuse. It includes information relative to the extent of the industry, 

 soils, planting, fertilizing, diseases, pruning, varieties, marketing, financial 

 returns, and instruction in fruit growing. A fruit tree census, showing kinds 

 and varieties of fruits, age, diameter, spread, and yield of trees, is appended 

 to the report. 



Dusting fruit trees for insects and disease, W. S. Blair (Agi: Gaz. Canada, 

 6 (1919), No. 1, pp. 16-18). — The results secured by the author during the 

 seasons of 1917 and 1918 indicate that if dusting is properly done it should 

 prove as effective as spraying. The results of tests conducted in 1918 are pre- 

 sented in tabular form and indicate that dusting was practically as efficient 

 as lime-sulphur in controlling scab and insect injury. Dusting resulted in the 

 saving of considerable time, but the cost of four applications per acre (40 

 trees) was $26.55 more than where the trees were spra 



The cutinization of apple skins in relation to their keeping qualities and 

 their environment, WINIFRED I'kkky and J. N. Maktin (Trans, lotoa Hort. 

 Soc, 52 (1917), pp. 180-192. figs. 37; abs. in Proc. Iuica Acad. BoL, 24 (1917), 

 pp. 483, 484). — The authors present the results of a study of several varieties 

 of apples obtained from Iowa. New York. Arkansas, and Washington, with 

 special reference to the relationship existing between the cutinization of the 

 apple skin and the keeping quality and environment of the apple. 



The work showed a relation between the thickness of the cutinized area and 

 the records of the keeping qualities of the different varieties of apples studied, 

 as well as a relationship between the amount of cutinization and the moisture 

 during the growing: period. No correlation was observed between cutinization 

 and the mean temperature of the different States during the growing period, 

 nor did the percentage of sunshine during the growing period seem to be an 

 important factor in the cutinization of apple skins. 



Grape culture. It. E. Marshall (V<7. Pvlytcrh. Inst. Est. Bui. $4 (1919). pp. 

 23, figs. 5). — A practical treatise on grape culture, including a list of varieties 

 of the common American grape recommended for planting in Virginia, in addi- 

 tion, notes are given on the methods of growing and pruning Muscadine grapes. 



Agricultural explorations in Mexico, W. PoPSROK (Cal. Citrogr.. 4 (1918), 

 Nos. 1, pp. 2. 3; 2, pp. 29. 43, 4S-4S, flffs. 4)-— These are the first two of a 

 series of papers dealing primarily with avocados, but also with many other 

 Mexican fruits and economic plants. 



The etrog or cedrat of the Hebrews, J. E. Coit (Cal. Citrogr., 4 (1918). No. 1. 

 p. 3, figs. 3). — The author presents suggestions relative to the possibility of 

 growing etrogs (Citrus medivt) in California for supplying Hebrew trade in 

 connection with religious ceremonies. 



Furrow-manure method of feeding orange trees, A. D. Shamel (Cal. 

 Citrogr., 4 (1918), No. 1, pp. 5, 18. figs. 3). — This paper comprises answers to 

 a number of Inquiries relative to the method of distributing manure in citrus 

 orchards in Bahia, Brazil, previously described < E. S. R., 38, p. 846). 



Notes on a navel variety of the Satsuma orange, D. B. Mackie (Col. 

 Citrogr., 4 (1918), No. 1, pp. 20, 21). — The author calls attention to a navel 

 strain observed in a variety of the Satsuma. known in Japan as Owari, and 

 gives a summary of a study of this strain conducted by A. Kikuchi, of the 

 Yamagaws Experiment Station. A wide range of variation was observed 

 relatlTe to the number of navel and normal fruits borne on the same tree. 

 Measurements of these fruits showed that the navel fruits averaged 1 a i 

 and heavier as compared with normal fruits growing on the same tn 



