PEDIGREE INHERITANCE. 421 
dity, reversion, variation, in-breeding, cross-breeding, adaptation and 
selection are one and the same, and not separate questions. The key to the 
knowledge of the changes is supplied by the pedigree. The Golden Rule 
is, that there are no golden rules. 
In the study of the literature of genetics and breeding, in the man¬ 
agement of the animals kept for breeding purposes, in the judging of the 
points of the single individuals, and in the establishing of the conclusions 
based on the experience, my wife gave me every possible assistance. — I take 
this opportunity also, to return my sincere thanks to Prof. Dr. G. Entz sen. 
for his kind interest and valuable advice. 
Every experimenter and breeder can compare the statements and 
conclusions made known in this paper, with his own experience, and 
I would be very thankful to any person who would kindly give me (Hun¬ 
garian National Museum, Budapest) any information either for or against 
the assertions herein expressed. 
