PERIOD OF GESTATION. 



403 



10 calved between the 299th and 321st days, the mean time 

 being 303 days. 1 



The extremes here given were not changed when 

 the number observed was extended to 1,131 animals, 

 but the results as to the average are not stated. 8 



Earl Spencer has recorded the period of gestation 

 in Y64 cows with the following result : Least period, 

 220 days ; mean, 285 days ; longest period, 313 days. 

 But he remarks that he has " not been able to rear 

 any calf produced at an earlier period than 242 days." * 



As the table published by Earl Spencer is of inter- 

 est in many particulars, it is copied in full : 



" British Husbandry," vol. ii., p. 438 ; " The Complete Grazier," 

 p. 47. 



5 Youatt on Cattle," p. 527. 



3 Journal of the Royal Agricultural Society, vol. i., pp. 166, 167. 



