II CONTENTS. 



Page. 



Action of chromium, magnesium, manganese, iron, and aluminum, Gerber 309 



Action of alkali salts on saccharifi cation of starch by ferments, Gerber 309 



Enzyms which decompose hexotrioses and stachyose, Bierry . . . ._ 310 



In regard to reducing ferments; the Schardinger enzym (perhydridase). Bach . . 310 



Preparation and properties of an oxidase in fruits, Bassett and Thompson 310 



The relation between tannin and another colloid in ripening fruits, Lloyd 310 



Action of heat upon emulsin, Bertrand and Compton 310 



Note on Kjeldahl's process, Edwards and Chads 311 



New method of determining nitrites, Rupp and Lehmann 311 



The estimation of small quantities of manganese, Bertrand 311 



The detection of silicates, fluorids, and fluo-silicates. Browning 311 



The valuation of chemical fertilizers of the superphosphate industry 311 



The determination of dry substance in roots, Soderbaum 312 



Physico-chemical tests in bromatology, Bonamartini 312 



Biological analysis of honey, Moreau 312 



The pinene test for lemon oil. Parry 312 



Estimation of formic acid in foods, Fincke 312 



Polarimetric estimation of sugar by method of Jolles, Bardach and Silberstein. . 312 



The unification of reducing sugar methods — A correction, Walker 312 



Isolation of raffinose from beet sugar products, Zitkowski 313 



Examination of lactose and by-products of its manufacture, Burr and Berberich . 313 



The enzyms present in cow's milk, Giffhorii 313 



The occm-rence of tyrosin crystals in Roquefort cheese, Dox 313 



Methods of sampling milk 313 



A new formula for the calculation of added water in cow's milk, Slataper 314 



The value of chemical constants for detecting watered milk, Cornalba 314 



Detection of watered milk, Ledent 314 



The superficial tension of milk and milk adulteration, Carapelle and Chimera. . 314 



The electrical conductivity of milk, Binaghi 314 



The alcohol test and the acidity of milk, Fendler and Borkel 314 



Determination of iron by the colorimetric method, Lachs and Friedenthal. . . . 314 



Estimating the bacterial content of milk, Kuntze 315 



Schaeffer's curd tester, Grimmer 315 



Progress in dairy chemistry and dairying during second half of 1910, Grimmer. . 315 



Progress in dairy chemistry and dafrying during first half of 1911, Grimmer 315 



Methods for the analysis of sulphur intended for agricultural purposes 315 



Modification of the sulphonation test for creosote, Bateman 316 



Determination of nicotin in the presence of pyridin bases, Surre 316 



Paper technology, Sindall 316 



Laboratory book for the potash industry, Tietjens and Roemer 316 



METEOROLOGY — WATER. 



The obstacles to the progress of meteorology, Abbe 316 



Meteorological observations 316 



Meteorological investigations on summer floods of Oder, Hellmann and Eisner. 317 



Surface water supply of California, 1909, Clapp and Henshaw 317 



Water resources of Antelope Valley, California, Johnson 317 



The underground waters of the Oasis of Kharga, Beadnell 317 



The waters of Kharga, Grabham 317 



The nonnitrifi cation of sewage in sea water, Purvis, McHattie, and Fisher 317 



The Berlin sewage farms, Roechling 317 



SOILS — FERTILIZERS. 



Philippine soils and some of the factors which influence them. Cox 318 



The soils of Poland, von Trzcinski 318 



Some typical Auckland soils, Aston 318 



Alkali soils from the knee of the Niger River, Hubert 318 



Absorptive capacity of some Palatinate soils for plant nutrients, Engels 319 



Investigations on nitrogen economy of the soil, Schneidewind et al 319 



Formation of nitrates in cultivated soil, Koch 319 



Behavior of ammoniacal nitrogen in limed and unlimed soil, Lemmermaun et al . . 320 



The chemical nature of the organic nitrogen in the soil, Jodidi 320 



The "availability" of phosphoric acid in the soil, Vipond 321 



Influence of acid content of green plants on utilization of phosphates, Corso. . . 321 



Decomposition of carbon compounds in the soil, Lemmermann et al 321 



