44 HORTICULTURE [BoT. Absts., Vol. VII, 



281. Ramsey, H. J., and S. J. Dennis. Operating air-cooled apple storage houses. Better 

 Fruit 153 : 10, 32-34. 1920.— A verbatim excerpt from U. S. Dept. Agr. Farmers' Bull. 852 

 (1917). 



282. RicALTON, Jas. The cocoa-nut palm. Amer. Forest. 26:529-531. 3 fig. 1920— 

 A popular description of Cocos nucifera and its products. — Chas. H. Otis. 



283. Roberts, George, and A. E. Ewan. I. Report on soil experiment fields. II. 

 Maintenance of fertility. Kentucky Agric. Exp. Sta. Bull. 228: 89-131. 1920.— See Bot. 

 Absts. 7, Entry 463. 



284. Russell, E. J. Farming in the New Era. [Rev. of (1) Harris, T. S. The sugar 

 beet in America, xviii + 3^2 p., 32 pi. 1919. (2) Fletcher, S. W. Strawberry growing. 

 xxii + 325 -p., 24 pi. Macmillan and Co.: London, 1917.] Nature 104: 593-594. 1920. 



285. Sears, F. C. Personal experiences in fruit growing. Rept. Vermont State Hortic. 

 Soc. 17: 8-12. 1919. — The author discusses nine important factors in the producing, grading, 

 and marketing of apples. — George P. Burns. 



286. Stark, Lloyd C. French fruit stocks. Nation. Nurseryman 28': 193. 1920. — A 

 French syndicate has been organized which apparently controls a large part of the nursery 

 stock grown in France. As a result the prices have increased to a prohibitive figure, despite 

 the fact that there is a big crop this year of everything except plum, and this is more plentiful 

 than last year. The respective prices per thousand for last year and this year are quoted for 

 plums as $39 and $250, while this same stock formerly sold for $7. In France pear stock 

 can be purchased for $19 per thousnd, whereas the price quoted for export is $70; in France 

 quince stock, $17, for export $50. This situation is condemned, and it is stated that no stock 

 will be purchased at these prices. — J. H. Gourley. 



287. SuEMATSTj, Naoji, and Kikuji Kuwatsuka. Studies on the varietal resistance of 

 the peach to artificial inoculations with Gloeosporium laeticolor Berk. Ann. Phytopath. Soc. 

 Japan V: 1-12. 1920. 



288. Taylor, C. R. The auction method of distributing perishable food products. Rept. 

 Vermont State Hort. Soc. 17:35-43. 1919. — The author describes the auction system, and 

 shows that in cases of large production with a standardized commodity concentrated at 

 one place it is the most efficient method of disposing of the product. — George P. Burns. 



289. Thornber, H. Cover crops, tillage, and commercial fertilizers. Better Fruit 15^: 5, 

 20-22. Aug., 1920. — Experiments conducted for eight years in the Bitter Root Valley, Mon- 

 tana, with clover and peas as cover crops resulted in a substantial increase of the nitrogen 

 content of the soil. Clover was sown in May and plowed under in the fall of the following 

 year. Peas were also sown in May, but were plowed in the same fall. The first soil analysis 

 was made after the experiment had been in progress for eight years. The nitrogen content of 

 the first two feet of soil of clean cultivated plots was 1514 pounds per acre, while the plot 

 sown to a cover crop of clover contained 3019 pounds per acre. Another plot sown to clover 

 but cut each year, the hay being removed, showed a total nitrogen content of 2167 pounds. 

 The plot on which peas were used as a cover crop had 2375 pounds of nitrogen per acre. The 

 yield of fruit (apples) was highest on the clover plot on which the clover had been plowed 

 under, and lowest on the clean cultivated plot. The writer believes that growing a leguminous 

 cover crop is by far the best and most reasonable way of supplying the soil with humus and 

 nitrogen. — A. E. Murneek. 



290. Watson, John. Aphis-resistant apple stocks. Nation. Nurseryman 28^: 213-214. 

 1920. — The nurserymen of America must come to appreciate to a greater extent the impor- 

 tance of securing nursery stock which will be resistant to aphis injury. The influence of the 

 stock upon the scion as well as the influence of the scion on the stock is recognized. For 



