INHERITANCE OF ACQUIRED CHARACTERS 173 



fact of its dam having previously produced seven mule 

 foals. 



" Sallie " (Plate XII, upper) was foaled by a saddle bred 

 mare fifteen years old and was the ninth foal from this 

 mare. The previous eight foals were all mules. The mare 

 " Sallie " was characterized by a small refined head of 

 good quality, a small, short and pointed ear, rather scanty 

 mane and tail, fine bone, broad and rounded foot and quiet 

 and gentle disposition. 



The mare " Hallie " shown in Plate XI was sired by a 

 Standardbred stallion from the dam " Maude " (Plate XI, 

 lower). Maude had previously given birth to ten female 

 mule foals. At two years of age " Hallie " weighed 800 

 pounds, was fifteen hands high, had a short, small, refined 

 head, short pointed ears, heavy and long mane and tail, 

 broad flat foot and a rounded body. All of the external 

 characters of this mare were clearly horse characters and 

 not mule characters. There was no suggestion of any 

 resemblance to the mule in any of its characters. 



" Crewdson " (Plate XIII, upper), three years old, was 

 sired by a Hackney stallion from the dam " Kate " (Plate 

 XIII, lower), the latter having given birth to eleven mule 

 foals followed by the horse foal " Crewdson." This 

 animal was sixteen and one-half hands high and weighed 

 1000 pounds. The head was small and narrow, ear 

 short and small, mane and tail medium heavy, foot broad 

 and flat. " Crewdson " was characterized by a heavy 

 mane and tail, small ear, refined head and broad rounded 

 foot. 



The cases cited and the illustrations used were selected 

 because it was assumed that if the influence of a previous 

 impregnation was likely to be exhibited at all it would 

 appear in those dams which had produced a large number 



