CHEMISTRY. 607 



169). — A detailed account, edited by the secretary of the association, H. W. Wiley, 

 of the proceedings of the convention of this association, held at Washington, D. C, 



October 20-28, 1897, a summary account of which has already appeared (E. S. K., 

 it, pp. 101-111). 



Progress in agricultural chemistry, W. Schneidewind (Chem. Ztg., ,.'.' {1898), 

 No. 82, pp. 870, 871 : 85, pp. 905-907; 86, pp. 911-913). — Reviews briefly recent inves- 

 tigations «>n soils i especially the losses of fertilizing constituents from the soil), barn- 

 yard manure, green manures, and nitrogenous commercial fertilizers; on phosphoric 

 acid, potash, and lime; on plant and animal production, and on analytical methods 

 for fertilizers and foods. Most of the investigations referred to have been noted 

 from time to time in the Record. 



Report of the chemist, J. B. Lindsey (Massachusetts Hatch Sta. lipt. 1897, pp. 

 74-7S).— Brief notes are given on the work of the chemical department, which in- 

 cluded examination of a number of samples of water and milk, determination of 

 starch, experiments with pigs, and a study of the feeding value of salt-marsh hay 

 (E. S. R., 10, pp. 472-481). 



Determination of phosphoric acid in superphosphates, L. ViGNON {Bui. Soc. 

 Chhn. Paris, 3. ser., 19 (1S9S), No. 20-21, pp. S60-S62).— This article has already been 

 abstracted from another source (E. S. R., 10, p. 410). 



Tables for calculating phosphoric acid from magnesium pyrophosphate. 

 Gultsc'UKE ( Tabelle cur berechnung der pijrophosphorsauren magnesia auf phosphorsaurc, 

 Wiesbaden: < '. W. Kreidel, 1S9G, pp. 20). 



Methods and solvents for the approximate de rmination of the probably 

 available plant food in soils, W. Maxwell (Landw. Vers. Stat., 50 (1898), Xo.~>-6, 

 pp. 131-334). — This article has been noted from another source (E. S. R., 10, p. 527). 



Comparison of methods for estimating caffein, E. F. Ladd (Amer. Chem. Jour., 

 20 (1898), No. 10, pp. 866-869).— The author compares the methods of Peligot, Cros- 

 schoff, and Gomberg. 



Determination of tannin, L. Vignon (Bui. Soc. Chim. Paris, 3. ser., 19 (1S98), No. 

 ::. pp. 923-926). 



Method of determining starch in black and in -white mustard seed, J. W. 

 Lloyd (Bui. Pharm.. 12 (1S9S), No. 11, pp. 497-499). 



Detection of formic aldehyde in food substances, E. Rimini (Ann. Farm., 1898, 

 p. 97; abs. in Bui. Soc. Chim. Paris, 3. ser., 20 (1898), No. 23, p. 896). 



The determination of dirt in milk, R. Eichloff (Ztschr. Vntersuch. Nahr. v. 

 Genussmtl., 1 (1898), No. 10, pp. 678-683).— Instead of Stutzer's sand filter, the author 

 proposes to separate the foreign matter in milk by whirling samples of 300 cc. in a 

 centrifugal run at the rate of 2,000 revolutions per minute, and to collect the sedi- 

 ment on an asbestus filter. Samples to be tested in this way must be perfectly 

 sweet and, as a preservative, the author recommends potassium bicarbonate instead 

 of formalin, as the latter is said to curdle a small part of the casein, which is then 

 separated with the dirt. 



Analysis of milk — determination of the amounts of added water, A. Villiers 

 and M. Bertault (Monit. Sci., 12 (1898), Apr., pp. 270, 271; abs. in Jour. Soc. Chem. 

 Ind., 17 (1898), No. 7, p. 686). 



The value of Fleischmann's formula in milk analysis, E. Ackermaxn (Milch 

 Ztg., 27 (1S9S), No. 49, p. 770). — Remarks on the use of the formula in laboratory 

 work. 



Composition of the proteids of cereal and leguminous seeds: Practical 

 results of the researches of E. Fleurent, A. Livache (Bui. Soc. Encour. Ind. Nat., 

 97 (1898), pp. , r ,47-5r,0; abs. in Jour. Soc. Chem. Ind., 17 (IS9S), No. 7, p. OS-',). 



Method for the quantitative determination of proteids in beer -wort and other 

 protein solutions, II. SchjerniNG (Ztschr. Anah/t. Chem.. 37 (1S9S), No. 7, pp. 413-422; 

 abs. in Analyst, 23 (1S9S), Dec, p. 326). — In this paper the author summarizes the 

 results of his previous work in this line, and presents a complete method for deter- 

 mining the different proteids in solution. 



