128 EXPERIMENT STATION EECORD. 



The present status of the artificial nitrogen fertilizer industry, F. W. 

 Dafeet (Ztschr. Landw. Versuchsw. Osterr., 15 (1912), No. 1, pp. 101-119; 

 Monatsh. Lmidic, 5 (1912), No. 1, pp. 1-8). — This is a review of the present 

 status of the manufacture of ammonium sulphate, nitric acid, lime nitrogen, 

 and nitrids, de:^',:!ribiug briefly the principal processes which have been proposed 

 for this purpose and have shown commercial possibilities. The author is of 

 the opinion that among these are processes which can be profitably used when- 

 ever there is commercial necessity for supplementing present supplies of nitroge- 

 nous fertilizers. 



Some recent experiments with, calcium cyanamid ornitrolime, and their 

 practical bearing (Intemat. Inst. Agr. [Rotne'i, Bui. Bur. Agr. Intel, and 

 Plant Diseases, 3 (1912), No. 3, pp. 6'i9-657). — This is a summary of the more 

 important results of the principal recent investigations on this subject, with a 

 bibliography of IS references. 



Marl for soil improvement from various formations in Hanover, A. Rosen- 

 bach (Jour. Landw., 59 (1911), No. J/, pp. Jj07-Jfl8; ahs. in Chem. Abs., 6 (1912), 

 No. 5, p. 663). — ^Attention is called to the variation in the use of the term marl, 

 and it is pointed out that many so-called marls contain a very small amount of 

 lime and owe their fertilizing value chiefly to their phosphoric acid content. 

 This is true of a large number of marls and associated deposits from the region 

 of Gottingen, of which analyses are reported. 



The sootfall of London: Its amount, quality, and effects (Lancet [London], 

 1912, I, No. 1, pp. 4'^-50, flg. 1). — This article reports observations on the amount 

 and character of soot falling in London, from which it is estimated that on the 

 117 square miles comprising the administrative county of London, including the 

 city proper, there is an annual sootfall of 76,050 tons containing 6.000 tons of 

 ammonia, 8,000 tons of sulphate (SOi), and 3,000 tons of chlorin as chlorids. 



Fertilizers: Their source, purchase, and use, C. B. Smith (Redlands, Cal„ 

 1911, 2. ed., rev. and cnl., pp. 61, pis. 2, figs. 2). — This is a second revised and 

 enlarged edition of this book, which, it is stated, was " written for the use of 

 farmers and fruit growers, with special reference to citrus culture." 



Fertilizers in 1912, C. Guffroy (Vie Agr. et Rurale, 1912, No. 10, pp. 2SS- 

 24O). — A brief review is given of progress in fertilizer investigations in 1912, 

 more particularly those relating to the fertilizing effect of manganese, sulphur, 

 magnesium, chlorin, sodium chlorid, boron, chromium, and radioactive minerals, 

 soil inoculation, role of water in plant growth, standard and new nitrogenous 

 fertilizers, phosphatic and potassic fertilizers, lime, gypsum, and manure, as 

 well as those bearing on the use of fertilizers against plant parasites and 

 diseases. 



Inspection and analyses of commercial fertilizers, P. F. Trowbridge et al. 

 (Missouri 8ta. Bui. 99, pp. 111-181). — Analyses and valuations of 838 samples of 

 fertilizers inspected during the spring and fall of 1911 are reported. 



Commercial fertilizers (Off. Rpt. Sec. Ohio Bd. Agr. on Com. Ferts., 1911, 

 pp. 208). — This is a report of the official fertilizer inspection in Ohio in 1911, 

 giving the text of the fertilizer law which became effective December 1, 1911, 

 and analyses and valuations of 695 brands of fertilizers examined during the 

 year, with discussions of the results and of the nature, purchase, and use of 

 fertilizers. 



Tabulated analyses of commercial fertilizers, W. Frear (Penn. Dept. Agr. 

 Bui. 218, pp. 11). — This bulletin gives the results of fertilizer inspection, includ- 

 ing analyses and valuations, in Pennsylvania from August 1 to December 31, 

 1911. 



Licensed commercial fertilizers, 1912, F. W. Woll (Wisconsin Sta. Circ. 

 Inform. St, pp. 12, IS). — A list of manufacturers and brands licensed for the 

 vear 1912. 



