FERTILIZERS. 1063 



and 2; (2) the rice i)laiit seems to possess a relatively considerable resistance power 

 against an excess of luaguesiuui carbonate, since this does not depress the yield so 

 much as the same excess of lime; (li) rice culture demantlw special attention to the 

 proper ratio of lime to magnesia, since the maximal yield depen<ls to a great degree 

 upon the ratio 1:1." 



The effect of liming in connection with the application of mineral fertili- 

 zers, P. Van Biervliet {Rer. (Ihi. Atjrmi. [Louvahi], IS (1!>04), -V". ~, l>p. Sl-SS). — 

 A brief general statement. 



Stone lime v. ground lime as a fertilizer, M. Saul {Dent. Lnmhc. Frcsse, 31 

 {1904), ^'J- 36, pp. oil, 322). — A l)rief discussion of the relative merits of these two 

 kinds of lime under different conditions. 



The preparation of soluble phosphoric acid from crude phosphates for 

 fertilizing purposes, A. YsT(iAAKi) [Teknisk Ugehlad, CJiri.sliunid, .50 (1903),. p. 

 3£9; abs. in Chem. Ztg., 28 {1904), No. 17, Repert. No. 4, p. 56) . — A method of render- 

 ing jihosphates soluble by fusion with carnallit is described, and the fertilizing value 

 of the product thus obtained is discussed. Pot experiments comparing the product 

 with Thomas slag on oats and peas are reported. The results showed that the pre- 

 pared phosphate was more effective, especially as regards seed jiroduction, than the 

 slag. The author attributes this result to the fact that the phosphoric acid in the 

 prepared phosjihate is in the form of a magnesium salt and the use of the phosphate 

 resulted in a more favora])le I'elation between lime and magnesia. 



Rock phosphates and other mineral fertilizers: Their origin, value, and 

 sources of supply, C. Ciiewings {Adelaide, South Au.it ralia: C. E. Bristow, 1903, 

 pp. 48, map 1). — This pami)hlet discusses sources of nitrogen and potash in fertilizers 

 and tests for these substances as well as tests for phosphoric acid and the origin, 

 sources, mining, and preparation and use in fertilizers of the various phosphates. 



The century in phosphates and fertilizers, P. E. Chazal {News and Courier 

 [Charleston'], 1903, Centennial ed., ])p. 62-65, Jigs. 4; 1904, Apr. 20, pp. 12, 13). — An 

 historical review. 



From mine to field, E. Willis {News and Courier [Cliarleston'], 1904, Apr. 20, pp. 

 10, 11). — This is a review of the trade in rock phosphate and fertilizers for the year 

 ended Septeml)er 1, 1903. 



Mines and quarries {U. S. Dept. Com. and Labor, Bureau of the Census Bui. 9, pp. 

 69) . — This is a preliminary report for the year ended December 31, 1902. The data 

 of special agricultural interest contained in this bulletin are statistics relating to the 

 production and value of phosphate, gypsum, and marl. The product of the phos- 

 phate mines of the United States during 1902 is reported as 1,548,720 long tons worth 

 $4,922,943. The production of gypsum during the same year was 816,478 short tons, 

 worth §2,089,.34]; of marl, 12,439 short tons, worth $12,741. 



The mining and preparation of nitrate of soda, V. Schoultz {Deut. Landw. 

 Presse, 31 {1904), No. 39, pp. 341, 342, Jigs. 6). — A brief description of the methods 

 employed in Chile. 



Potash fertilizers: Sources and methods of application, II. J. Patterson 

 {Pennsylvania State Dept. Agr. Bui. 117, pp. 45). — Substantially a reprint of Maryland 

 Station Bulletin 89 (E. S. R., 15, p. 461). 



Analyses of commercial fertilizers and Paris green, W. C. Stubbs and C. H. 

 O'RouRKE (Louisiana Sta.'<. Bui. 76, 2. ser., pp. 266-359). — This bulletin is a detailed 

 report on the fertilizer and Paris green inspection in Louisiana during the season 

 1902-3. It includes also the text of the State fertilizer law as amended at the last 

 session of tlie legislature. 



Fertilizer inspection, C. D. Woods and J. ]\I. Bartlett {Maine Stu. Bui. 101, pp. 

 21-36). — "This bulletin contains the analyses of manufacturers' samples of brands of 

 fertilizers licensed before March 1, 1904." 



