FOODS ANIMAL PRODUCTION. 



(119 



not ill tlie form of nutrients. The author found that V2 nev cent of the 

 total nitrogen of meat was nitrogen of extractives, including nitrogen 

 of nonalbuminoid compounds which will not coagulate. This <'-ontains 

 not only the meat bases but also protein substances, /. e., albumoses 

 and peptones, and sarco-phosphoric acid recently discovered by Sieg- 

 fried. If the meat is extracted in the heat this portion of the nitroge- 

 nous substances also contains gelatin. 



The protein compounds of muscle plasma, von Furtii {A)-ch. 

 FatJi. und Pharnialol., 36; ahfi. i)i Dent. Tierarztl. Wochensch., 4, Ko. 3 ; 

 Ztschr. FIrisch- und Milchhyg.^ 7 {ISHT), No. -I,2>' 7^).— The author finds 

 that muscle plasma contains about 20 per cent of paramyosinogiu (Hal- 

 liburton) and 75 to 80 per cent of myosinogiu (Halliburton^, and also, 

 in the case of frog muscle plasma, myogenfibrin. This is sometimes 

 found in smaller quantities in the muscle plasma of warm-blooded ani- 

 mals. In the author's opinion, Kiihue's myosin is the same as Halli- 

 burton's paramyosinogiu. 



Relation of sex in thoroughbred calves, T. Collier {Xew York 

 State Sta. Rpt. 1894, pp. 125-132). — To collect data on this subject cir- 

 cular letters were sent to leading breeders of thoroughbred stock of the 

 different breeds. As a result the data are compiled for 68 herds, includ- 

 ing 10 breeds, 769 cows, and 3,614 calves, showing number of calves of 

 each sex produced by the cows of each breed in each period of lactation. 

 A summary of these data is given in the following table: 



Proportion of calves of each sex. 



Breed. 



Jersey 



Holstein-Friesian 



Guernsey 



Shorthorn 



Red Polled 



Ayrshire 



American Holderness 



Devon 



Aberdeen Angus 



Galloway 



Jersey grade 



Total 



Number Number Number Number Per cent Per cent 

 ofcows. of calves, of bulls, of heifers, of bulls, of heifers, 



254 



209 



110 



9.5 



51 



21 



3 



i 



5 



10 

 7 



1,273 

 1,040 

 451 

 358 

 259 

 140 



583 



517 



211 



180 



118 



77 



3 



4 



7 



16 



14 



3,614 



1,730 



690 

 523 

 240 



178 



141 



63 



5 



4 



9 



17 



14 



1,884 



45.8 

 49.7 

 46.8 

 50.3 

 45.6 

 5.5.0 

 37.5 

 50.0 

 43.8 

 48.5 

 50.0 



47.9 



54.2 

 50.3 

 53.2 

 49.7 

 54.4 

 45.0 

 62.5 

 50.0 

 56.2 

 51.5 

 50.0 



52.1 



The bearing of these data on certain theories is discussed. Dividing 

 the time under observation into 4 periods shows the following in regard 

 to the proportion of males and females : 



rerceiiiaijes of male and female births in different periods of lactation. 



Period. 



First, second, and third periods of lactation 



Fourth, fifth, and .sixth iieriod.s of lactation 



Seventh, eighth, and ninth periods of lactation 



Tenth, eieventh, twelfth, and thirteenth periods of lactation 



Females. 



Per cent. 

 52.3 

 51.5 

 53.1 

 52.5 



