916 EXrERIMENT STATION RECORD. 



Researches on cellulose, C. V. Cross and E. J. Bevax {London, Neiu Yorl; and 

 Bdinhaij: Loiii/iiiuiik, (irerii <.(• ('o., 1901, pp. VI 1+17 5). — An outline of the chemistry 

 of the structural elements of plants with reference to their natural history and 

 industrial uses. 



The determination of sulphur in plants, G. 8. Fraps {Jour. Amer. Chein. Soc, 

 24 {1902), No. 4, pp. 346-348). — The author found a considerable loss of sulphur in 

 the preparation of ash with calcium acetate as compared with the nitric acid 

 method. In the latter method it was found convenient to heat 5 gm. of the material 

 with 20 cc. of nitric acid in a porcelain dish, add 10 cc. of a 5 per cent solution of 

 pf)tassium nitrate, evaporate, and ignite. 



On the detection of small quantities of arsenic in foods, especially in beer, 

 J. C. Berxtrop {Chem. Nors, 85 {1902), Xu. 2207, p. i^^^).— The arsenic in 1 liter of 

 beer is precipitated as ammonium-magnesium arsenate and after the destruction of 

 albuminoids by nitric acid is determined by the Marsh or Gutzeit test. 



The titration of arsenious acid with potassium permanganate, O. KtJHLiNG 

 {Ber. Deut. Chem. GeselL, 34 {1901), pp. 404-406; abs. in Analij><t, 26 {1901), No. 306, 

 p. 247). — The author has devised the following method: In a flask cleansed with 

 permanganate and sulphuric acid the arsenious acid is dissolved in hot 30 to 40 per 

 cent sulphuric acid. The solution is diluted to 100 cc. and heated to the boiling 

 point. Potassium permanganate solution is introduced, rapidly at first, and then 

 more slowly. After each addition the liquid is heated for 1 to 2 minutes nearly to 

 boiling, this process being cdutinued until the red color no longer disappears. By 

 this method 2KMnO4(=o0) correspond to fAs-jOj. The results reported by the 

 author with this method are quite concordant. 



A hydrolytic derivative of the globulin edestin and its relation to "Weyl's 

 albuminate and the histon group, T. B. Osborne {.Jour. Amer. Cheui.. Soc, 24 

 {1902), No. 1, pp. 28-38). 



The basic character of the protein molecule and the reactions of edestin 

 with definite quantities of acids and alkalis, T. B. Osborxe {.Tour. Amer. Chem. 

 Soc, 24 {1902), No. 1, pp. 39-rS, dgmx. 2). 



A type of reaction by which sodium carbonate and hydrochloric acid may 

 be formed in the animal organism, T. B. Osborxe {.four. A)ner. Chem. Soc, 24 

 {1902), No. 2, pp. 138, 139). 



Sulphur in protein bodies, T. B. Osborxe {Jour. Amer. Chem. Soc, 24 {1902), 

 No. 2, pp. 140-167; tranduted by V. Griessmayer in ZAschr. Analyt. Chem., 41 {1902), 

 No. 1, pp. 2.5-35) . — The above four articles have been noted from another source 

 (E. S. R., 13, pp. 520, 521). 



Methods of estimating caflPein, Beitter ( Chem. Ztg., 25 ( 1901), No. 81, p. 869). — 

 A study of the various methods with different substances. The author cites the Keller 

 method, with certain modifications, as the most efficient. 



A new method of determining manganese, G. vox Kxokre {Zt.schr. Angew. 

 Chem., 14 {1901). No. 46, pp. 114U-1162). 



Miscellaneous chemical w^ork, R. H. Shaw ( Wisconsin Sta. Rpt. 1901, pp. 285- 

 288). — Analyses of 17 samples of feeding stuffs, -1 of fertilizing materials, 7 of lime 

 rock, 3 of dairy salt, 4 of tobacco extract, 1 of clam shells, and 1 of oyster shells are 

 reported. 



An apparatus facilitating the analysis of sugar beets, R. H. Shaw ( Wiscon- 

 sin Sta. Bpt. 1901, pp. 281-284, fig- 1). — The author describes an apparatus designed 

 to facilitate the determination of the specific gravity of the juice and its preparation 

 for the polariscope. 



A new form of alkalimeter, C. B. Davis {Jour. Amer. Chem. Soc, 24 {1902), 

 No. 4, pp. 391, 392, figs. 2). 



A new desig:n for potash bulbs, J. N. Tervet {Chem. Neics,85 {1902), No. 2206, 

 pp. 112, 113, fig. 1). — The apparatus consists of 4 bulbs through which the potash is 

 caused to circulate bv the current of gas. 



