SOILS FERTILIZERS. 525 



the other coustituents. There were very slight variations in total nitrogen and 

 humus. 



The production of sulphate of ammonia in the year 1909, C. G. Atwater 

 (Amer. Pert., 33 {1910), No. J, pp. 16-20).— The world's production of sulphate 

 of ammonia in 1909 is given as 963,490 metric tons. Of this amount England 

 produced 353.590 tons, Germany 322,700 tons, and the United States 90,000 tons. 

 The total consumption in the United States is given as 149,192 short tons at an 

 average price of .$.')G.04. The imports amounted to 40,192 short tons. 



Report on the effects of the new nitrogenous manures on potatoes and hay, 

 R. B. Greig (Aberdeen and No. of Scot. Col. Agr. Leaflet 9, pp. 7). — In field 

 experiments with calcium cyanamid and calcium nitrate as compared with am- 

 monium sulphate and sodium nitrate both the calcium nitrate and the cyanamid 

 were effective sources of nitrogen for potatoes, the nitrate being slightly better 

 than the cyanamid. The calcium nitrate was not quite as elTecive as sodium 

 nitrate and ammonium sulphate on hay. Calcium cyanamid appeared to be 

 entirely uusuited for top-dressing hay. 



Present state and tendency of the electrochemical industry with respect 

 to calcium nitrate (Bui. Mciifi. Off. Rcnseig. Agr. [Paris], 9 (1910), No. 5, 

 pp. 505-521 ) . — This is a report to the ministry of agriculture of France on the 

 various processes which have been proposed for the manufacture of calcium 

 nitrate and the extent to which these processes have been used in practice. 

 Estimates of cost of i)roduction by different processes and in different factories 

 are also given. 



Air nitrate fertilizers, F. H. Mason (Daily Cons, and Trade Rpts. [U. 8.], 

 n. ser., 1 (1910), No. //, pp. 56-58). — A brief account is given of the development 

 of the jirocess of manufacture of nitrates by the electrical oxidation of the air. 



Fixation of the nitrogen of the air by the Schcnherr process, P. Pierron 

 {Rev. Electrochim. et Elcctrometal., 4 {1910), No. 5, pp. 90-9.'/ ) .—This article 

 discusses the i)rinciples upon which this method rests and describes the method 

 and its practical application. 



On the formation of calcium cyanamid, F. Foekster and H. Jacobv {Rev. 

 Electrochim. et Electromcta]., !, (IDtO), No. 5, pp. 95-100).— This article re- 

 ports the results of further investigations (E. S. R., 22, p. 225) on the following 

 points involved in the manufacture of cyanamid : The action of calcium fluorid, 

 self heating of the mass in the formation of cyanamid, and the cyanid content 

 of cyanamid. 



A new nitrogenous fertilizer, aluminum nitrogen {Zt.sclir. Landic. Kammer 

 liraiinschiceif/, 19 (1910). No. 12, p. /.3r).— This article describes briefly Serpek's 

 process of utilizing aluminum carbid in the manufacture of aluminum nitrogen. 

 The process is said to be simple and cheap as regards raw materials and th'j 

 product may be used directly as a fertilizer. 



Phonolite meal, a new potash fertilizer, P. Kfjische (Clicin. ZUj., .{'i (1910), 

 No. .'///, p. J87).— Experiments by v.irious investigators are briefly reviewed. 

 The general conclusion is that phonolite meal is not comparable with potash 

 salts as a potash fertilizer. 



[Utilization of milk waste as a fertilizer], II. P.. Mii.i.ek (I)aili/ Cons, and 

 Trade Rpts. [U. -S'.], n. ser., 1 (1910), No. 12, p. 156).— A process of preparing 

 a fertilizer by mixing milk waste with phosi)hate and fermenting with yeast is 

 described. The i)rodnct i)repariKl by this process is reported to contain water 

 27 per cent, total phosphates 52.7S i)er cent, ph()S|)hates soluble in 2 per cent 

 citric acid 28.35 per cent, nitrogen 1.05 per cent. 



Analyses of domestic manures, .M. S. ilcDovvEi.r. (Pennsi/lrania Sta. Rpt. 

 1909, pp. 198-201) .—Analyses of samples of pigeon manure, sheep manure, and 



