Period of Gestation in Cows. 



333 



Ruby, born Sept. i6, iSSS : 



Sept. 6, 1890, 

 Sept. II, 1891, 

 Nov. 14, iSg2, 

 Feb. 22, 1894, 

 Jan. 31, 1895, 

 Dec. 24, 1S95, 

 Dec. 26, 1896, 

 May 26, 189S, 



Sadie, born March 2, iSg2 : 



Mch. 21, 1894, 

 Mch. 10, 1895, 

 May /, i8g6, 

 June 25, 1897, 



Glista Nelherland, bom Nov. 21, /Sg2 : 



Oct. 21, 1895, 

 May ro, 1897, 

 Sept. /, /SgS, 



Summary of Table III. 



Average of all Average of all 



gestations except twin gestation 



days. days. 



Freddie 282 284 



Pet 282 284 



Ruby 281 282 



Sadie. . 280 282 



Glista Netherland 281 , 282 



Average 281 283 



Avg. 281 



Avg. 281 



Twin gestation 

 davs. 



273 

 273 

 277 

 274 

 278 



275 



Summary. 



Of 182 births the average period of gestation was almost exactly 

 280 days. 



The shortest period was 264 days ; the longest 296 days. 



Approximately equal numbers of births occurred on each day 

 from the 274th to the 287th inclusive. 



The period of gestation was the same for male and female 

 calves. 



