22 
PROOFS OF EVOLUTION. 
ideal forms or parts of organs,—the so-called 
structural “types’’ in living organisms,—runs 
throughout the entire animal and vegetable king¬ 
doms. The structural evolution of one mammal 
is a type of the structural development of all. 
We will therefore select the horse, as at once the 
most beautiful and useful, needing only the gift 
of language to make him human. The beautiful 
form, color, size and structure of this animal were 
not fashioned at once, but have come to their 
present perfection through small and gradual 
changes extending back through vast periods of 
time. It has taken Nature ages and ages to make 
a horse, and she isn’t done with him yet or he 
wouldn’t balk and shy. The stock-breeders have 
joined hands with Nature and are rapidly improv¬ 
ing his beauty, speed, and strength, while heredity 
is silently keeping the score. 
From Geological discoveries we know that the 
horse came from a five-toed ancestor. In Europe, 
India and America he has been traced as far back 
as the early Eocene period, where he appeared no 
larger than a common fox. He then had three 
toes behind and four in front, with the rudiment 
of a fifth. Later on, we find him increased to the 
