426 EXPEBIMENT STATION RECOED. 



it contained about 4 per cent of potassium and then to subject the resulting 

 bittern to other processes of manufacture. The most advantageous point of 

 concentration would, however, have to be determined for each particular brine." 



Lime and its uses in agiicult\xre, D. A. Gilcheist {Annstrotig Col, Netc- 

 casUe-upoiv-Tyne, Agr. Dciit. Bui. 12 {1915), pp. 2^). — This bulletin discusses 

 the use of ground lime, ground limestone, gas lime, chalk, and lime mud in agri- 

 culture and reviews different experiments by others showing the effect of liming 

 on different crops. 



Agricultural lime analyses {Md. Agr. Col. Quart., No. 68 (1915). pp. 11). — 

 This pamphlet contains actual and guarantied analyses of agricultural limes 

 offered for sale in ilaryland from June, 1914, to May, 1915, and the text of 

 the. Maryland lime inspection law. 



Fertilizer analyses {ild. Agr. Col. Quart., No. 67 (1915), pp. 52).— This 

 bulletin contains actual and guarantied analyses and comparative valuations 

 of G29 samples of fertilizers and fertilizing materials offered for sale in Mary- 

 land from August, 1914, to January, 1915. A note on home mixing of fertilizers 

 is also included. 



Fertilizer analyses. (J/(f. Agr. Col. Quart., No. 69 (1915), pp. 5.5).— This 

 pamphlet contains actual and guarautietl analyses and comparative valuations 

 of 809 samples of fertilizers and fertilizing materials made at the college from 

 February to July. 1915. 



Analyses of fertilizers. Analyses of cotton-seed meal, B. W. Kilgore et al. 

 (Bui. X. C. ])cpt. Agr., .^5 (V.il',), No. 11, pp. 120).- This bulletin contains 

 analyses and valuations of 1,981 samples of fertilizers and fertilizing materials 

 collected under the North Carolina fertilizer inspection law during the fall 

 season of 1913 and the spring season of 1914, and analyses of 165 samples of 

 cotton-seed meal. 



Analyses of commercial fertilizers, P. H. Wessels et al. (Rfiodc Island Sta. 

 Insp. Bui.. 1915, Oct., pp. 12). — This bulletin contains actual, and in some cases 

 guarantied, analyses with valuations of 78 .'samples of fertilizers and fertilizing 

 materials (including lime and plaster) collected in Rhode Island in 1915, and 

 representing a iiart of the fertilizer inspection for the year. 



The international movement of fertilizers and chemical products useful 

 to agriculture (Intcrnat. Inst. Agr. Rome, Bui. Agr. and Com. i<tatis., 6 (1915), 

 No. 9, pp. Jf99-532). — This review, issued in September, 1915, is the third of a 

 series (E. S. R., 33, p. G2G) and gives figures for the fertilizer production and 

 trade for 1913, 1914, and the first half of 1915. Data are also given for imports 

 and exports of sulphur for the different countries and for the production of 

 copper sulphate in Europe and North America. No figures are given relating to 

 the production of potash salts in Germany. 



A bibliography of 305 references to recent literature on the subject of fer- 

 tilizers is appended. 



AGRICULTURAL BOTANY. 



Respiration experiments with sweet potatoes, H. Hasset.bbing and L. A. 

 Hawkins (V. 8. Dcpt. Agr., Jour. Agr. Hc.icarch, 5 (1915), No. 12, pp. 509- 

 5^7). — The experiments described were conducted to ascertain whether any 

 correlation exists between the seasonal changes in the sugar content of sweet 

 potatoes and their respiratory activity and also whether the monosaccharids or 

 the disaccharids furnish the chief material for respiration. The experiments 

 were carried on at a temperature of 30° C. (80° F.), that temperatm-e having 

 been chos(>n owing to the fact that it is essentially the temperature used in 

 curing sweet potatoes for storage. 



