SOILS FERTILIZERS. 1113 



A new method for the preparation of lime nitrogen, F. Cakl«on ((Ihcni. 

 Xlf/., ;W (lUOG). .\(i. 101. It. IJIU : (ihN. in Clicni. Zoiihl., W07, /, No. 6, p. Jf29).— 

 Ill the procx'ss (Icscrihcd cMlciuni lliKirid is substitutod for tlio c'llciuiii clilorid 

 used in tlio I'olzeiiius inctliod of iircpariiif; nitrof^cn liiiio. It is cl.iiiiM'd lli.it liy 

 tliis iiu'iUis a iK)nli.vi,'roscopic jirodiict is oi)t:iiii('d whifli is much oasier to luuidle 

 and which docs not niitlcrj^o decomposition and loss of nitrogen on standing as 

 is till' case witii tiic I'olzenins jiroduct. 



Nitrate of soda from the air, H. Danneel (riihsclKiii. 11 (niOl), No. 12, 

 l)/). 225-230, A.'/s-. li). 'I'lic r.irkeland and Eyde jn'ocess is descrilied and dis- 

 cussed in its economic aspects. 



On the production of nitric acid from ammonia, W. Ostwalo (Bcnj-u. 

 Ifiittnuiiiiini. h'tiinlsclidK. .i (IDiKi). p. 71: obs. hi Vlwin. Zt(/.. 31 (l'.)in'). Vo. ](). 

 h'cixrt. .\<K N. /). '/N). — After l)riet1.v discussing different nietliods of artificial 

 fixation of free nitrogen and tlie utilization of various materials and waste 

 products in the manufacture of annnonia, the author describes a method which 

 lie and I']. I'.rauer worked out in which, by the use of platinum foil and a certain 

 .•imount of jtlatinum s]ionge as catalyzers, 8.5 i)er cent of the tiieoretical amount 

 (if nitric acid was oi)tained from anunouiu. The application of this process, 

 using gas liiiuor as the raw material, in a factory at Bochum, Prussia, is 

 described. The possibility of utilizing city refuse in the iireparation of am- 

 monia is also referred to. 



The nitrate of soda industry of Chile {Ber. Handel u. Indus., 9 (1906), No. 5, 

 /ip. 133-200). — This is a report on the development, present condition, and out- 

 look of this industry, by the German consul at Valparaiso. 



Nitrate of soda and ammonium sulphate for cereals, Kleberger (Detit. 

 l.diidir. I'rcsse, S) (1901). No. 15, pp. 119, 120). — Comparisons of these two 

 fertilizers on winter rye. winter wheat, and sunnner oats gave results leading 

 to the conclusion that under certain conditions, particularly on heavy soils 

 with deep subsoils in wet seasons, it is possible to obtain larger yields with 

 .•immonium sulphate than with nitrate of soda. It is preferable to use the 

 sulphate in one application before seeding. On spring wheat nitrate of soda 

 is thought to have given better results than ammonium sulphate, the latter 

 apparently delaying the ripening. 



Comparative study of the different phosphatic salts contained in super- 

 phosphates, K. Guii.LiN {Bui. Hoc. Afn: France, 1907, Feb. 15. pp. 188-192, pj. 

 1: Jour. Aur. Prat., n. scr., 13 (1901). I, No. 6. pp. 168-111, fiff. 1; Bui. 8oc. Nat. 

 Af/r. France, 61 (1901), No. 1. pp. J/l-SS). — Comparative pot tests on wheat, buck- 

 wheat, and leguminous plants, of UKmocalclum, bicalcium, aluminum, and mag- 

 nesium phosphates are reported. The conclusions drawn from the results are 

 that bicalciuni phosphate is as assimilable as monocalcium phosphate, that 

 .iluminum phosphate gives increases in yield comparing favorably with those 

 olitained with calcium i)hosphate, and that trimagnesiuni phosjihate is as 

 readily assimilated by plants and produces almost the same effects as mouo- 

 cilcium and bicalcimn phos])hates. 



Citric-acid-soluble phosphoric acid in Thomas slag, M. de Molinari and 

 O. LKiOT (Bui. Ar;r. \ Bru.'<xcls]. 23 (1901), No. 1. pp. 50-55, figs. 3).— Compara- 

 tive pot tests with oats and barley of normal Thomas slag and that which had 

 been digested with 2 per Cent citric acid according to ^Yagner's method are 

 rejiorted. The extracted slag was nnich less effective on both crojis than the 

 untre.'ited material, and the assimilation of phosphoric acid by the plant was 

 nnich smaller in the former than in tlit^ latter case. 



Concerning the functions of sodium salts, II. J. Wiieelkk. I'.. L. Haijtwell, 

 ET AL. (Rhode Island Hta. Rpt. 1906. pp. 186-316, d(jm. i).— The results of 



