CATTLE 1139 



legged) and 5 with fox terrier body. These results therefore prove that in 

 addition to the basset-shaped dogs there were also in the 2nd generation 

 dogs of normal stature giving practically the ratio which agrees with the 

 theoretical calculation (15.75 : 5.25). 



On examining the animals resulting from the ist filial generation from 

 the dihybrid point of view, experiment proves that the different charac- 

 teristic features underwent combinations which, in addition to the parent 

 tj^pes, produced 2 new biotj^pes : the spotted basset and the black and tan 

 fox terrier. The appended Table shows the results obtained from the 

 matings. 



It will be seen from the Table that, of 21 dogs of the 2nd filial genera- 

 tion, there were : 



13 black and tan bassets 3 black and tan fox terriers 



4 spotted bassets 2 spotted fox terriers 



In conclusion, the Mendelian ratios have for the most part been sub- 

 stantiated : whether the results be considered separately or taken in the 

 aggregate, it is found that the resulting ratios are very close to those calcu- 

 lated by theor5^ 



It is thought that on the basis of these experiments in crossing, dog 

 breeders may build up a theory of hereditary' transmission of certain cha- 

 racters peculiar to different breeds of dogs. 



884 - Relation between the Quantity of Milk formed and that obtained in Milking. — 



ZwART S. G., in Zeitschrift iiir Flcisch- iind Milchhygicnc, 26th Year, Xo. 15, pp. 231-C34 ; 

 Xo. 16, pp. 246-250. Berlin, May i and 15, iyi6. 



Agricultural literature contains abundant data in reference to milk 

 and the milk-secreting organs, but few particulars as to the relation between 

 the quantity of milk formed and that obtained in milking. Some expe- 

 riments were carried out in connection with these questions, the princi- 

 pal results of which are set out in the present work. 



According to Nuesch the secretion of milk may be divided into 2 phases ; 

 rest period and milking. The rest period is the interval between two milk- 

 ings ; the milking represents the phase during which secretion is promoted 

 b}' mechanical and physical stimulation, and a distinction is made between 

 preparation and execution of the milking. The first phase depends on 

 the chemical factors of the blood which form the milk, while the second 

 phase depends entirely- on nervous influences. 



The data relating to the quantity of milk formed during the period of 

 rest diverge greatly. Some contend that the greater portion of the milk is 

 formed during the rest period, while others maintain that it is chiefly formed 

 during milking. 



As a result of these exi)erinients the Attthor is unable to confirm the 

 first opinion as being correct. The arguments put forward by the parti- 

 sans of the second theory, according to which the quantity of milk drawn 

 from the udder exceeds the latter itself in volume, are also controverted. It 

 was possible repeatedly to inject into the udder the quantity of milk pre- 



