AGRICULTURAL CHEMISTRY AGROTECHNY. 217 



Detecting and estimating hexamethylenetetramin in wine, Bonis (Ann. 

 Falsif.. 3 ( 1910), Yo. 17. pp. 106-112. figs. 2).— The author draws attention to the 

 fact that ethyl aldehyde under certain conditions will also give a reaction with 

 rosanalin and sulphuric acid. For determining urotropin quantitatively he 

 proposes, in lieu of a better method, to determine the ammonia in the 

 wine by distillation with magnesium oxid and calculating the results back to 

 urotropin. 



The sugaring of musts and new wines according to the new wine law^, P. 

 KuLiscH {Ahs. in Chrm. 7Ag.. .JJ ilOlO). Yo. 10, Rcpert., p. -iS). — This article 

 consists of a compilation of wine laws for Alsace-Lorraine, and points out to 

 the practical wine maker certain facts as to this law. 



A modified Rose-Gottlieb method for milk and dairy products. Eichloff 

 and Grimmer tMikhic. Zcntbl.. 6 (1010). Yo. 3. pp. ll.'t-121. figs. .5).— The 

 results of this work indicate that the R<>se-Gottlieb method is not absolutely 

 accurate and that it is necessary to operate according to the directions specified 

 by Hesse. 



The modified method dispenses with the graduated cylinder, the whole of the 

 ethereal extract being used for the fat estimation. The ether is also removed 

 by a siphon and a specially devised flask which can be weighed is necessary. 

 Shaking the sample with two separate ix)rtions of ether-petroleum-ether was 

 found to be superfluous and rinsing twice with 25 cc. of ether after siphoning 

 was sufficient. Attempts to displace ethyl alcohol by the cheaper methyl alco- 

 hol were not successful. In evaporating off the ethereal layer, the authors 

 noticed that an accumulation of moisture on the sides of the flask took place. 

 In order to eliminate this disturbing factor a wide-mouthed Erlenmeyer flask 

 is used. 



[Determination of catalase in milk], C. Retis iJoitr. Roy. Inst. Puh. 

 Health. IS ilfUO). Yo. J, pp. 231-231). — The author coucludes from his investi- 

 gations with numerous samples of milk from known sources that the triple 

 origin of catalase, that is, from the leucocytes, bacteria, and the milk itself, is 

 probably correct. In the case of the milk catalase. it is pointed out that this 

 may originate from the solution of the leucocytes in the udder, so that an 

 extracellular catalase may in reality be intracellular. The mere determination 

 of the catalytic activity of milk is liable to lead to unwarranted conclusions. 



In regard to the water content of butter. F. Bengen {Chcm. Ztg., 3.J {1910), 

 Xo. 19. p. I'l^). — A polemical article in reply to Siegfeld (see p. 210). 



Determination of water in butter. M. Siegfeld i Client. Ztg.. 34 {1910). Yo. 

 3.S'. itp. 330. 331). — A controversial article in reply to Bengen (see above). 



The significance of the stalagmometer, J. Traibe iBiochcm. Ztschr.. 24 

 (1910), Xo. 3-0, pp. 341-3 'lo). — A description of some of the uses to which this 

 apparatus can be put. See also a iirevious note ( E. S. R.. 22. p. 413). 



The quantitative formol titration method for amino and hippuric acids 

 and polypeptids in urine, Y. Henriques and S. P. L. Sorexsex i Ztschr. 

 Phi/siol. Chnn.. 64 (1910). Yo. 2. pp. 120-143).— A study of methods, with a 

 description of them. 



An adiabatic calorimeter for use with the calorimetric bomb. F. G. Bene- 

 dict and H. L. Higgixs (Join: Aincr. Chcm. Soc. 32 {1910). Yo. 4- PP- 46t-4^, 

 tig. 1 ) . — A description of the apparatus is given, together with a specimen 

 combustion sheet obtained with its use. 



Experiments on the preparation of sugared, dried pineapples, H. C. Gobe 

 {U. S. Dept. Agr.. Bur. Chcm. Circ. .57. pp. S. fig. 1). — The principal fact de- 

 veloped in this work is that slice«l pineapples when drieil and sugared yield a 

 very palatable product of fine keeping quality. 



