996 CATTLE 



773 - Feeding Cows with the Subcutaneous Matter of Skins intended for Tanning; 



Experiments in Germany (i). — Gerlach, iu Deutsche Lamhuuischaftliche I'rcsse, 

 43rd Year, No. 26, p. 229. Berlin, March 2Q, iyi(). 



For his feeding experiments the Author used a subcutaneous material 

 (" Leimleder ", ghie leather i. e. leather cuttings containing gelatinous mat- 

 ter), at present sold in Germany under the inappropriate name of " Baden 

 meat meal" and containing, according to the analysis made by him: 

 14.72 % of water, 55.77 % of crude protein, 12.35 % <^f fat, 10.06 % of 

 mineral matter. The crude protein is a mixture of albuminoids (chiefl}- 

 collagen), pure proteins and amides, being substances soluble in the gastric 

 juices of animals. 



As test animals there were used 9 milch cows between the 2nd and 3rd 

 month of the lactation period. The^^ were given as basal ration per 1000 

 kilograms live weight per day; 5 kg. chopped forage, 4 kg. hay, 20 kg. beetroot 

 leaf silage, 15 kg. mangolds, 20 kg. potatoes, 1.5 kg. wheat bran, i kg. of lu- 

 pins with the bitter taste removed. The starch value was 10.3 kg ; the 

 quantity of pure digestible protein was i.i kg. As cows which have 

 just calved must usually receive 1.6 to 1.9 kg of pure digestible protein and 

 a starch value of 9.8 to 11. 2 kg, the basal ration lacked 45 to 73 % of the 

 first element, while the starch value was fairly large. To make up the de- 

 ficiency there was added to the basal ration, for one group 3 kg. of linseed 

 cake and for the other 1.5 kg. of glue leather. The animals at once took to 

 the latter. 



The experiment, which was begun on the 20th January, was intended 

 to continue until the 28th February. During that time the milk secretion 

 w^as 10 % less in the glue leather group, but the milk was a little richer in 

 fat. 



The difference between the production of the two groups being small, 

 the experiment was continued until the 23rd March. The group which at 

 first received glue leather was then given linseed oil cake, and vice-versa. 

 During this second period, the cows receiving glue leather gave somewhat 

 more abundant and more fatty milk : this increase in the percentage of 

 fat was also observed in the first period. 



Assuming that the linseed cake caused the production of kkj parts 

 of milk and 100 parts of fat, the glue leather produced 98 and 102 parts 

 respectively. 



^. In conclusion, glue leather is recommended as a good concentrate for 

 cows in milk. 



774 - Skim Milk with an Addition of Sweetened Flour for Rearing Sucking Calves. - 



Edin Harold in Kungl. Landtbruks-Akademiens Handlingar, och Tidskrift. Year I\', 



Xos. 1-2, pp. 83-120. Stockholm 1916. 



In Sweden, i 700 000 calves are produced annually of which only 400 000 

 are reared, the others going to the butcher. The majority are sold shortl)- 

 after birth, when the meat has not yet " set " and the price is always low, 

 not exceeding 19s. 7d. per c^vt. live weight. 



(i) In connection with the use of this substance in pigleeding. see B. i<)i5, Xo. 1064. [Ed.) 



