208 EXPERIMENT STATIOlSr RECORD. 



cipitate of constant composition and to thus insure the accuracy of the deter- 

 mination are reported. 



Investigations of the solubility of the phosphoric acid in som.e typical 

 Swedish soils, G. Nannes (A'. Laiidthr. A/cad. Haiidl. ocli Tid.skr., .'/.'/ {1905}, 

 Xo. 6. pp. 387-402). — Analyses of a number of Sl^araborg County soils on which 

 field trials were conducted showed that no sharp line can be drawn between 

 available and nonavailable phosphoric acid by means of the solubility in 2 per 

 cent acetic, citric, or hydrochloric acid, while the water-soluble phosphoric acid 

 appeared to give valuable hints in this direction. Tliis corroborates the results 

 of T. Schloesing, jr. (E. S. R., 14, p. 233), on this point. 



The Dyer method for determining the availajjle pliosphoric acid l^y means of 

 a citric-acid solution in the author's trials gave results corresponding with 

 those of the field trials in the case of clay soils only, while for other types of 

 soils no definite agreement in results could be traced. — f. w. woi.l. 



On the chemical equilibrium observed when a number of bases are simul- 

 taneously associated with i^hosphoric acid, M. Berthelot (.!»». Chim. ct 

 Phys., S. .ser., 8 {1906). July, pp. 289, 2.00).— This is a reply to a criticism in 

 Quartaroli's article previously noted (E. S. U.. 17. p. 103G). 



Analysis of nitrate of soda, R. Bensemann {ZtscJir. Angew. Cheiii., 19 

 {1906), \o. 11, pp. -'ill-'ilS). — Various modifications of the author's methods 

 previously described (E. S. R., 17, p. 952) to make them apply with more ac- 

 curacy to potassium nitrate or to sodium nitrate rich in potash are explained. 

 I On two new^ color reactions for nitric acid, C. Reichard {Chein. Ztg., 30 

 {1906), Xo. 65, pp. 190, 791). — The color reactions of berberin and arlmtin are 

 briefly described and their applications explained. 



The investigation and valuation of fertilizers, feeding stuffs, seeds, and 

 soils by the official methods of the Association of German Agricultural 

 Experiment Stations, P. Krische {Die riiicrsHcliinif/ mid Bcgutachtuiig von 

 Dungemitteln, Futtermitteln, Saatiraren und Bodeiiprobcii nach den offiziellen 

 Methoden des Terhandes landwirtscluiftlichcr Versuchsstationen im Deutscheii 

 Reiche. Berlin: Paul Parey, 1906, pp. 2^2, pgs. 5). — A summary of these 

 methods. 



Methods of determining carbon dioxid, W. Holtschmidt {Cliem. Ztg., 30 

 {1906), No. 50, pp. 621-625, figs. 3). — The author explains various ways in which 

 the use and application of a modification of the method of Stutzer and Hartleb 

 (E. S. R., 11, p. 110), in which acid potassium tartrate is substituted for am- 

 monium chlorid for expelling carbon dioxid, may be extended, and describes 

 different forms of distilling apparatus suited to the methods described. 



On the determination of carbon dioxid in waters, G. Bruhns {Ztsclir. 

 Analyt. Cliem., 1,5 {1906), No. 8, pp. .',73-488: abs. in Cliem. Centhl., 1906, II, 

 No. 12, pp. 1019, 1020).- — A modification of the Pettenlfofer lime-water method, 

 using either lime water or baryta water, and a special form of apparatus are 

 described. 



On the reliability of the Baudouin reaction, K. Rordam {Tidsskr. Lando- 

 konom., 1906, No. 6, pp. 373-378). — A review of recent worlv in regard to this 

 question, leading to the conclusion that further investigations are required to 

 determine the value of the method for the detection of artificial butter, espe- 

 cially in view of the periodicity of the sesame-oil reaction in human milk ob- 

 served by Engel (E. S. R., 17, p. 1006).— F. w. woll. 



Formaldehyde: Its composition and uses, B. H. Smith {U. S. Dept. Agr. 

 Yearbook 1905, pp. .^77--iS2). — Notes are given on the general properties of 

 formaldehyde and the use of this material as a disinfectant, deodorant, fungi- 

 cide, and preservative. Analyses of 29 commercial samples collected from (iif- 



