114 EXPERIMENT STATION BECOED. [Vol. 38 



ether (1:2), and then washed with petroleum ether alone and dried at 100° C. 

 The weight of the precipitate is converted to the weight of the gossypol by the 

 use of the factor 0.74. 



Tabular data comparing the sulphuric acid test for gossypol and the per- 

 centage of gossypol with the toxicity of the cottonseed product are submitted. 



Single variety ciders and perries, B. T. P. Barker and O. Grove {Jour. 

 Bath and West and South. Counties Soc, 5. ser., 11 {1916-17), pp. 139-1^5; 

 Univ. Bristol, Ann. Rpt. Agr. and Hort. Research Sta., 1916, pp. 10-15). — Tabu- 

 lar data of the chemical composition and other particulars of the ciders and 

 perries made during 1915-16 are submitted. 



Home uses for muscadine grapes, C. Dearing (U. S. Dept. Agr., Farmers' 

 Bui. 859 {1917), pp. 23, figs. 4)- — This discusses and gives directions for malting 

 muscadine grape products, primarily for home consumption. The topics treated 

 are sirup, unfermented grape juice, jelly, canned grapes, spiced grapes, catsup, 

 conserves, preserves, jam, marmalade, mincemeat, and flavoring sirup. 



Successful canning and preserving, Ola Powell, edited by B. R. Andrews 

 {Philadelphia and London: J. B. Lippincott Co., 1917, pp. XIX-j-371, pis. 4, figs. 

 164). — This volume discusses the subject under the following chapter headings: 

 History of the development of scientific canning ; bacteriology as applied to can- 

 ning; preparation and equipment; canning iu tin; canning in glass; processing — 

 hot-water bath ; processing at high temperature ; fruit juices ; fruits for canning ; 

 vegetables for canning ; preserves ; marmalades, jams, and conserves ; jelly mak- 

 ing ; pickling ; drying fruits, vegetables, and herbs ; preservation of meats ; use 

 of fruits and vegetables in the diet ; canning club organization ; the business side 

 of canning; and teaching canning and related activities. Each chapter is 

 followed by a number of questions which bring out the important points of 

 the subject matter treated in the chapter and also a bibliography. An appen- 

 dix is included containing the address of the various State institutions from 

 which agricultural extension work is directed and also lists of firms furnishing 

 supplies for canning and preserving. 



Removal of stains from clothing and other textiles, H. L. Lang and Anna 

 H. Whittelsey {U. S. Dept. Agr., Farmers' Bui. 861 {1917), pp. 35, figs. 3).— 

 The general principles of stain removal are given, as well as specific methods 

 for removing a large number of individual stains. 



METEOROLOGY. 



The sun and the weather, O. G. Abbot {Sci. Mo., 5 {1917), No. 4, pp. 4OO- 

 4IO). — This is a plea for more systematic, widespread, and accurate daily solar 

 constant measurements in the most cloudless regions of the earth like those 

 now being made by the Smithsonian Institution at Mount Wilson, Cal., and 

 Hump Mountain, N. C. It is stated that since the outstanding unexplained 

 departures from mean daily temperatures, as illustrated in this paper, for 

 Leavenworth, Paris, and Sydney " are seldom of much greater magnitude than 

 the changes which are found by Clayton to be produced by changes in the 

 sun, and as the maximum effects of solar changes follow from one to five days 

 after the cause, depending on tlie latitude of the station, it may be possible 

 that a very large proportion of weather changes will become predictable for 

 some time in advance, if daily measurements of the solar emission shall be 

 secured." 



Sunspots, climatic factors, and plant activities, J. A. Harris {Anier. Nat., 

 51 {1917), No. 612, pp. 761-764). — Reviewing various observations on this sub- 

 ject, the author reaches the conclusion that " the relationship between the 

 number of sunspots and the annual record of terrestrial meteorological phe- 



