262 Artijirial Insemination 



With more careful organization of the work and reliable parents, the 

 proportion of conceptions from artificial insemination reached in the 

 work of my pupil-practitioners not only the figures shown above (78 %), 

 but even exceeded them, rising to 87-88 and even 90 % . 



Table I. 



Artilicial inscminatiiiri took place under the following conditions: (I) the mares were 

 *'on heat," (2) the pairing period for artificial insemination was lonyer than one month, 

 (3) the complement of marcs was the usual one for a stud-farm, no mare being known to 

 be sterile, (4) the stallions were kno^Ti to be reliable. 



a 



o c " 



ESj aS Eg S 



fS.2 J.S f2 f 



Year, Kovernment, district, station 0*^5 "S— o"^ o „ 



anil name of person in charge do« ox ds 02 a — 



of operations ^XS '^u ^.* ZS o^g5 



1912. Don Army Province, 

 Provalski Army Stud-Farm, 



vet. surgeon V.'Y. Kartasheif So 17 11 2 ()0-7 



1913. Don Army Province, 

 Provalski Army Stud-Farm, 



vet. surgeon V.V. Kartashcff 31 22 3 (5 88-0 



1910. Govt, of Saratoff, dis- 

 trict and town of Kuznetzk, 

 pairing station, vet. surgeon 



N. A. Zhukoii 3(i 25 II 09-4 



1911. (jiovt. of Saratoff, dis- 

 trict and town of Kuznetzk, 

 pairing station, vet. surgeon 



N. A. Zhukoff ... ... 27 17 10 62-9 



1912. Govt, of Saratoff, dis- 

 trict and town of Kuznetzk, 

 pairing station. \et. surgeon 



N. A. Zhukoff ... ... 10 7 3 700 



1912. Govt, of Kharkoff, dis- 

 trict of Akhtyrsk, estate of 

 Konig Bros., Trostinnetz, 



assistant-surgeon Gafner ... 32 28 4 87-5 



1913. Govt, of Kharkotf, dis- 

 trict of Aklityrsk, estate of 

 Konig Bros., Trostinnetz, 



assistant-surgeon Gafner ... 43 39 4 90-7 



Total ... ... ... 209 \na 40 8 771 



It is clear from the above table that the proportion of conceptions in 

 artificial insemination is usually higher than that in natural pairing of 

 the same progenitors. 



The following table of results of artificial insemination of hor.ses on 

 the zooteclmical station of Askania-Nova (1912) illustrates that fact 

 still more clearly. 



