744 EXPERIMENT STATION RECORD. 



Experiments on the presence of arsenic in normal tissues as shown by a 

 biological method, M. Kegale(Z/.sv/*/\ Physiol. Chem.,42(1904), No.3,pp. 175-180).— 

 In a large majority of cases the author was able to demonstrate the presence of 

 arsenic by means of PenicUlium brevicaule in substances of animal origin, but regards 

 it as essential that the material should first undergo autolysis. The method followed 

 is discussed at some length. 



The Haldane apparatus; a new method of estimating the carbon-dioxid 

 content of air, B. Swaab {('hem. WeekU., 1, pp. 177-182, 189-192; ('hem. Centbl., 

 1904, J, pp. 745, 740; abs. in Ztschr. Untersueh. Nahr. u. GenussmU., 8 {1904), No. 8, 

 pp. 5. '4, 525, jig. 1) . — A form of apparatus for measuring small amounts of carbon 

 dioxid in air is described. 



The determination of carbon monoxid in room air, Albert-Levy and A. 

 Pecoul {Compt. Bend. Acad. Sci. [Paris], 140 {1905), No. 2, pp. 98, 99). — Using a 

 modification of Gautier's iodometric method, in which the iodin was determined" 

 colorimetrically after absorption in chloroform, as proposed by Rabonrdin and 

 Nicloux, the author found it possible to determine accurately as little as one part of 

 carbon monoxid in 200,000 of air. 



Invertin in honey and in the intestine of insects, Axenfeld (Zentbl. Physiol., 

 17 ( 190S), pp. 208, 269; aha. in Ztschr. Untersueh. Nahr. u. GenussmU., 8 {1904), No. S, 

 p. 518). — The author studied a ferment from the intestinal tract of the bees which is 

 found in natural honey. Artificial honey is, of course, free from this body. 



New views on the indirect estimation of extract bodies, K. Farnsteiner 

 {Ztschr. Untersueh. Nahr. u. GenussmU., 8 {1904), No. 10, pp. 593-603).— The data 

 reported have to do with the analysis of orange, lemon, and raspberry juice and 

 the detection of adulterants. 



Chemical department, F. W. Traphagen {Montana Sta. Rpt. 1903, pp. 28-37). — 

 A brief account is given of the work of the chemist during the year, including anal- 

 yses of Montana coal, clays, apple twigs, wheat grown under irrigation, and miscel- 

 laneous samples of barley, flour, alsike and red clover, alfalfa, and Canada field peas. 



Miscellaneous analyses, A. L. Knisely {Oregon Sta. Rpt. 1903, pp. 46-50). — 

 In addition to analyses of feeding stuffs noted elsewhere, analyses of 4 insecticides, 6 

 salt deposits, 11 soils, 6 clays, and 8 fertilizing materials are reported. 



Miscellaneous analyses, B. L. Hartwell and J. AV. Kellogg ( Rhode Island 

 Sta. Rpt. 1904, T>/>. 261-263). — Analyses are reported of one sample each of sulphate 

 of ammonia, nitrate of soda, dried blood, hen manure, guano, tankage, fine ground 

 bone, acid phosphate, basic slag meal, air-slaked lime, sulphate of potash, muriate 

 of potash, distiller's grains, and wheat bran, 5 samples of corn kernels, and 2 samples 

 of corn leaves. In connection with the analysis of basic slag meal it is noted that 

 "this material has proved, after a ten-years' test at this station, to be highly efficient 

 immediately, and to possess lasting qualities which make it rank among the best 

 phosphatic manures." 



Miscellaneous chemical work, F. W. Woll, G. A. Olson, and J. C. Brown 

 ( Wisconsin Sta. Rpt. 1904, pp. 342-349). — The solutions and tables used at the sta- 

 tion in the determination of nitrogen by the Kjeldahl method are given, and analyses 

 of marsh hay, corn silage, sorghum silage, pea-vine silage, liquid brewery refuse, sugar 

 beets, limestone, shale, fertilizing materials, desiccated milk, and dairy salt are 

 reported. The addition of a so-called blue-pill tablet, weighing, on an average, 0.695 

 gm. and composed of chrome alum, to 275 cc. of milk changed the specific gravity of 

 the sample to the extent of 0.0019 as determined by the Soxhlet lactometer at 

 15.5° C., and 0.0018 as determined by the Westphal balance. 



Cellulose, cellulose products, and artificial rubber, J. Berscii, trans, by W. T. 

 Brannt {Philadelphia: Henry Carey Bairdik Co.; London: Kegan Paul, Trench, Tr'ub- 

 ner& Co., Ltd., 1904, pp. XXII J r 345, Jigs. 41). — In this valuable summary the author 

 has collected information regarding the distribution and nature of cellulose, its 



