672 EXPERIMENT STATION KECOED. 



from guinea pigs and testing for glycosuria liefore and after a snbse(iuent 

 parturition. Three experiments failed to show any glycosuria following i)ar- 

 turition nor any increase in the glucose in the blood at that time. On the 

 other hand, a glycosuria was occasionally observed after parturition in normal 

 unoperated animals. It is considered probable that the glycosuria observed by 

 I'orcher was a post-operative effect. This work, therefore, confirms the view 

 that the complete i)rocess of lactose formation takes place in the cells of the 

 mammary gland. 



Homogenized milk, M. J. Eury (Indus. Lait. [Paris]. 31 (1906), ^o. .JS, 

 Ijp. 777-779). — Analyses were made of raw and sterilized milk before and after 

 treatment by the method of Gaulin. In the untreated nulk the fat globules 

 Avere often 10 nncrous in diameter, while in the homogenized milk they scarcely 

 reached a diameter of 3 microns. The determination of fat by the Gerber 

 method showed a lower percentage as a result of treatment. The Adams 

 method, however, was unaffected. The same result was obtained by the 

 Gerber method when the period of centrifuging was prolonged to 10 minutes. 

 In general, the composition of the milk before and after homogenizing was 

 identical, showing that this treatment did not modify the composition of the 

 milk. 



Investigations on the source and distribution of organisms of ropy milk, 

 M. ScHNEEBELi {Schiceis. Milch. Ztg.. 1906, Xo. J/o ; ahs. i)i Rev. Gen. Lait, 6 

 (1906), No. 2, p. Jf4). — The lactic bacteria capable of producing viscous fer- 

 mentation are not believed to be widely distributed. Occasionally, however, a 

 dairy may become badly infected with such organisms. An instance of this 

 kind was investigated. 



The pathogenicity of Streptococcus lacticus, 1*. G. IIeinemann (Jour. 

 Infect. Diseases, 4 (1907), A'o. 1, pp. 87-92). — Brief reference is made to in- 

 vestigations bearing upon the pathogenic action of streptococci isolated from 

 milk, the conclusion being drawn from the review that such organisms, when 

 freshly isolated and not originating from mastitis do not possess high virulence. 

 In an earlier article (E. S. R., 17, i>. 1007) the author reported the constant oc- 

 cm-renceof StreptococcU'S lacticus in milk and considered this organism identical 

 with Bacillus lactis acidi and also identical in morphological and cultural char- 

 acters on ordinary media with S. pi/of/eiic^. 



In the present investigations the aim was to determine if the virulence of 

 /b*. lacticus might be increased by successive passages through animals. Five 

 strains of >S. lacticus from different sources and three of *S'. pyogenes were used. 

 The conclusion drawn from the investigations is that these two organisms are 

 closely related not only in morphological and cultural characters but in patho- 

 genic properties. The virulence of ^. lacticus was gradually increased I)y re- 

 peated passages through rabbits so that after five or more passages, 2 cc. of a 

 24-hour-old broth culture Avas fatal in subcutaneous injections. The same 

 amount injected intravenously was fatal to the first animal. The lesions of 8. 

 lacticus in rabbits were the same as those produced by S. pyogenes in man. 



Report of the butter laboratory in Hango, Finland, 1904, G. A. Breden- 

 BERG (Landtbr. 8tyr. McddcL. 52 (1906), pp. 30). — The report gives an account 

 of the first year's work of the laboratoi\v established in connection with the Fin- 

 nish export butter exhibits. The output of 221 creameries was examined during 

 the year. The results of the deterunnatious on 1,051 samjiles of the refractive 

 index and contents of volatile fatty acids, respectively, by months are as fol- 

 lows : January, 50.5, 30.4 ; February, 50.4, 30.8 ; March, 50.9, 31.1 ; April, 50.4, 

 31.8; May, 51.8, 31.9; Jiuie, 51.4, 30.4; July, 52.1, 29.3; August, 52.8, 28.2; Sep- 

 tember, 53.0, 27.8; October, 51.9, 28.4; November, 50.5, 29.7; December, 50.0, 

 31.7 ; maximum, 54.0, 33.7 ; mluimum, 49.0, 25.9 ; and average, 52.5, 28.0. 



