FERTILIZEES. 



661 



It is further shown that the fermentation is due to aerobic organisms, since exclu- 

 sion of air prevents a rise in temperature. 



Attempts to cause spontaneous combustion failed, the author being nnaljle to secure 

 a temperature above 55° C. He thinks that for spontaneous combustion to occur the 

 boengkil must ])e in large masses. 



A study of the losses due to fermentation gave the following results for each of the 

 principal constituents: 



Lostten due to fermentation of hoengkil. 



Nitrogen. 



Sample 1 

 Sample 2 

 Sample 3 

 Sample 4 



Per cent. 



9.55 



18.11 



23.34 



24.62 



Per cent. 

 80.30 

 79. 12 

 70. 97 

 50.40 



Per cent. 

 16.56 

 31.48 

 44. 50 

 36.86 



Dry mat- 

 ter. 



Per cent. 

 22.14 

 31.53 

 35.26 

 38.69 



H. M. PIETERS. 



The management and use of barnyard manure, A. Stutzer [Die Behandlung 

 und Anirendung des Stalldungcrs. Berlin: Paul Parey, 1903, 2. ed., enl., pp. VIII-^168, 

 figs. 19). — This is a second enlarged edition of the author's treatise on the work of 

 bacteria in barnyard manure, and discusses in detail the action of bacteria in manure 

 and in soils, the production and management of barnyard manure, and the action of 

 the manure when applied to the soil in various ways and for various crops. A list 

 of 102 references to literature on the subject is given. 



On green manuring light land, T. S. Dymond and B. W. Bull {Essex County 

 Council, Education Corn., Tech. Labs., 1903, Oct., jip. 28, 29). — A brief account is given 

 of a comparison on wheat and oats of plowing under mustard and pasturing it off by 

 shet>p. The results are slightly in favor of pasturing off the crop. 



Manures in the Natal market, season 1903, A. Pardy {Natal Dept. Agr. 

 Bid. 4, 2'1'- ^'•)- — Analyses are reported with general discussion. 



The menhaden industry {Amer. Fert., 19 {1903), No. 6, pp. 7-14).- — The nature 

 and habits of the menhaden and the methods of catching the fish are described. The 

 uses made of the fish and the methods of treatment for preparation of oil and ferti- 

 lizer are explained. Analyses of samples of fish scrap are reported, and the fertilizing 

 value of the material is discussed. The names of a number of firms which prepare 

 fish fertilizers are given. 



Atmospheric nitrogen for fertilizing purposes, F. H. Mason ( U. S'. Consular 

 Bpts., 74 {1904), ^''>- '-80, pp. 36, 37). — A brief note referring to the preparation of 

 calcium cyanamid and its value as a fertilizer (E. S. R., 15, jip. 25, 347, 423). 



Fertilizers and amendments for soils deficient in lime, T. Bieler {Chron. 

 Agr. Canton Vaud, 17 {1904), No. 1, pp,,l-14)- — Simple methods of determining the 

 lime content of soils are described, and means of supj^lying deficiencies of this con- 

 stituent are briefly discussed. 



The mineral industry: Its statistics, technology, and trade for 1902 

 {New York and London: Engineer, and Min. Jour., 1903, vol. 11, pp. XXX -\- 891, 

 figs. 123). — This, the eleventh annual volume of this series of reports, gives the usual 

 summary of statistics, with special articles by different authors relating to the 

 mineral industry in the United States and other countries, prepared under the 

 editorship of J. Struthers. Among the sul)jects treated which are of special agri- 

 cultural importance are ammonia and ammonium sulphate, cement, clay, gypsum, 

 phosphate rock, potassium salts, (common salt and other sodium salts, and stone. 



"The production of ammonia (reported as its equivalent sulphate salt) and 

 ammonium sulphate by by-product coke-oven plants in the United States during 

 1902 is estimated at 65,000 metric tons, and for 1901 at 60,000 metric tons, which 



