Mabch 15, 1907] 



SCIENCE 



411 



was used. When a given amount of alkali 

 solution is neutralized by addition of casein, 

 the solution decreases in conductivity until 

 the neutral point is reached, after which 

 further additions of casein do not change 

 the conductivity. The results thus obtained 

 agree quite closely with those given by 

 phenolphthalein. 



The Sanitary Analysis of Water: L. P. 



KiNNICUTT. 



The Organic Components of the Soil in 

 their Relation to some Properties of 

 Boots: Oswald Schreinee and Howard 

 S. Reed. 



The authors pointed out the toxic prop- 

 erties of soil extracts from unproductive 

 soils and the effect of absorbing agents, 

 organic substances and simple treatments, 

 such as dilution with water, boiling, etc., 

 in improving the conditions for plant 

 growth. The oxidizing power of plant 

 roots in connection with these toxic condi- 

 tions, and the effect of fertilizers on these 

 oxidizing properties were emphasized, as 

 was also the production of toxic conditions 

 by previous root growth. 



Comparative Intensities of Colors used in 

 Confectionery: Edward Gudeman. 

 Method of obtaining strength of colors 

 without comparison with standard color, 

 based on height of column through which 

 diffused light will pass. Description of 

 apparatus. Details and results withheld 

 on account of other investigations on colors 

 now being made. 



The Changes in the Fat of Bread during 

 Baking, and Methods for its Determina- 

 tion: J. S. Chamberlain. 



The Unification of Reducing Sugar Meth- 

 ods: Percy H. Walker. 



The Ripening of Strawberries, Raspberries, 

 Blackberries, Gooseberries and Currants: 

 W. D. BiGELOw and H. C. Gore. 



The Preparation and Composition of Vine- 

 gar from Kieffer Pears: H. 0. Gore. 



The Preparation of Unfermented Apple 

 Juice: H. C. Gore. 



Absorption by Soils: F. K. Cameron and 

 H. B. Patten. 



Various types of distribution curves and 

 velocity equations were considered, and il- 

 lustrated by examples from the literature 

 and the authors ' own experiments with dye- 

 stuffs, fertilizer salts and liquid manures. 

 The causes for variations which soils pre- 

 sent, from the ideal types, were pointed 

 out, and the magnitude of absorption ef- 

 fects was shown to be much greater than Is 

 usually supposed. 



A Comparison of Methods for the Deter- 

 mination of the Alkalinity of Ash: Her- 

 mann C. Ltthgoe. 



Varying results on alkalinity of ash are 

 reported by different chemists owing to the 

 use of different indicators. The results 

 reported in the following table were ob- 

 tained on one sample each of vinegar, lime 

 juice and raspberry syrup. The difference 

 in the results is due to the presence of 

 phosphates. 



ALKALINITY OP ASH. C.C. OP n/10 ACID REQUIRED 



TO NEUTBALIZB THE ASH OP 100 



GRAMS OP SAMPLE. 



The Possible Use of Corn Oil as an Adul- 

 terant of Lard and its Detection: Wm. 

 McPherson and Warren A. Ruth. 

 (By title.) 



The Influence of Climate on the Composi- 

 tion of Wheat: J. A. LeClerc. 



