994 ANNUAL REPORT OF THE Off. Doc. 



PEIUOJ) OF GESTATION l>i DOMESTIC ANIMALS. 



FKO.M ANIMAL INIJUSTKY, (Skaw.) 



The average duration, approximately, of the period of gestation 

 in domestic qnadnipeds ma}' be given as follows: 



The ass, 3G5 days. The sow, 113 days. 



The mare, 330 days. The dog, 63 days. 



The eow, 282 days. The cat, 50 days. 



The sheep, 149 days. The rabbit, 30 days. 



The goat, 149 days. The gninea-pig, 21 days. 



The average duration, approximately, of the period in hatching 

 the eggs of the various domestic breeds of fowls may be set down 

 as follows: 



The goose, 30 days. The guinea-hen 2G days. 



The turkey, 29 days. Tlie hen. 21 days. 



The duck, 29 days. The pigeon, 18 days. 



The pea-hen, 2S days. 



The extremes in the duration of the period of gestation in the 

 mare, the cow, the ewe and the sow may be set down as follows: 



The mare, 295 davs to 370 davs. 



Tlie cow, 265 days to 300 days. 



The ewe, 145 days to 154 days. 



The sow, 110 days to 118 days. 



Tlie extremes in the duration of th(> period of incubation in the 

 various classes of domestic fowls named below may be given as 

 follows: 



The goose, 27 days to 33 days. 



The turkey, 26 days to 30 days. 



The duck 26 days to 32 days. 



The pea-hen, 28 days to 30 days. 



The guinea-hen 25 days to 26 days. 



The pigeon 16 days to 20 days. 



