AGRICULTURAL CHEMISTRY AGROTECHNY. 13 



In pure milk the c;ik-ulated sugar content varies from 4.2 to 4.S per cent. In 

 tbe case of watered milk tlie calculated sugar content will be too low. 



A study of the newer methods for detecting- watered milk, G. Cornai.ba 

 (.-l;(/;. ral.sif., 2 (IDOU), No. /'/, /)/). 52!}--hl'i) . — Coniparisons are made between 

 the aullioi-'s method, previously noted (E. S. R., 20, p. 41!)), and the cryoscopic 

 and refractometric methods. The author concludes that his method furnishes 

 as accurate results as either of these methods, and that it has the further 

 advantage of being ai)i)licable to milks which contain jtreservatives and those 

 which are not fresh. See also a previous note (E. S. K., 21, p, 614). 



Catalase apparatus for milk {Molk. Ztg. [Hihlcslieiin], 2.'f {J910), Xo. o, 

 pp. 7}, 7 J, pg. 1). — This apparatus, designed by Lobeck, is described as a con- 

 venient one for determining the catalase content of normal and pathological 

 milk. 



Apparatus for determining- the various combinations of carbon dioxid in 

 milk, A. Harille {Jour. I'lianii. ct Vliiui., 6. scr., 30 [1009), Ao. 10, pp. Ji52-Jio5, 

 fi(/. 1; abs. in Chcin. Ztff., 3'i {1910), Xo. 7, Rcpert., p. 30).— A 2-liter flask 

 having a double bored cork is placed in a water bath. In one of the borings is 

 inserted a funnel which has its internal tubal portion ground rough. Into this 

 is inserted a rubber stopper which also has a boring through which is passed 

 a glass tube connected with a gas wash bottle containing alkali. In the second 

 boring of the 2-liter tiask is placed the tube of a Liebig condenser, which in 

 turn is coimected with an empty gas wash bottle, a series of 2 test tubes con- 

 taining ammoniacal barium water, and another bottle containing limewater to 

 serve as an indicator. The limewater bottle connects with the air suction 

 pump. 



A new method for exanaining- cream, ITesse {Molk. Zig. [Ilildeslicim], 2'/ 

 {1910), Xo. 7, pp. 107, 108, fig. 1). — An api)aratus is described which is a combi- 

 nation of a pipette and butyrometer and is designated the " pipette-butyrometer." 

 Tests with this apparatus and the Spritz and liose-Gottlieb methods showed it to 

 be reliable. 



Tablet reagents for estimating sugar in animal urine, E. J. Mulleb ( Untcr- 

 suclntngcii iibcr die \'('n(:cn(lharl;cit dvr Mci-k'sclicn Rcagcnztahletten zur Quanti- 

 taticen Zuckerhcstimmung im Ticrharnc. liuiug. Diss., Univ. Bern, 1908, 

 pp. I/O, pi. 1). — The author concludes from tests with dog, horse, and cattle 

 urines that Merck's tablet reagents furnish good results. 



Agricultural analyses, R. Guillin {Analyses Agricoles. Paris, 1910, pp. J,.'i3, 

 figs. 51). — The first part of this work is devoted to general agricultural analyses, 

 while the second deals with the analyses required in the agrotechnical indus- 

 tries such as starch manufacture, glucose manufacture, distilling, and the 

 manufacture of super])lios|)hatos. 



Tartaric acid from wine residues, A. Janson {Cltcni. Indus. [Berlin], 32 

 {1909), Xo. 22, pp. 719^22; abs. in Ztsrhr. Angeir. Chem., 23 {1910). Xo. '/, 

 p. 180). — In addition to the crude tartaric acid obtained from wine residues, 

 the author draws attention to the amount of tartaric acid in tlie dregs and 

 yeast and i)roi)oses a method for its extraction. 



Extraction of oil from Chinese oil beans, L. Hoffmann {i^eifensiedcr Zig.. 

 30 {1909), pp. 1357, 135S; abs. in Chem. Zentbl., 1910, 1, Xo. 1, p. 67).— In the 

 smaller ("hiuese oil mills the moist beans are exposed to a pressure of from 

 30 to (!() kg. for about hours. Hankow beans containing about 14 to 1(J per 

 cent of oil yield by this method 9 to 10 per cent of a yellow fluid oil, which luis 

 a saponiflcation nunihci- of 10!). The relining of this oil is done in the same 

 manner as with cotlon-setHl oil. 



The method for extracting the oil in Europe is also described. 



