THE GAITS IN PARTICULAR. 507 



soil at the end of each of the lateral contacts. M. Lenoble 

 dti Teil l has observed several examples. 



It is none the less, however, a fact that if the amble is 

 in the vast majority of cases a marched gait, there must be, 

 between its two times, a very short period during which 

 the four members remain on the ground. This occurs 

 when the body is shifted from one lateral biped to the j-_ ^ 

 other. At this instant, difficult to perceive, so short is it, \ ' 



the period of exchange of contact is manifested. Hence the 

 true notation of this gait should be like that represented 

 in Fig. 195, and not like that which M. Marey has given, as f\ 

 reproduced above (Fig. 194). 







FIG. 195. Notation of the marched amble. 



There are seen, in fact, short quadrupedal bases, 1, 3, 



5 . . ., interposed between the fundamental bases 2, 4, 



6 . . ., which were alone admitted hitherto, save by M. 

 Lenoble du Teil, who was the first to observe and formu- 

 late the facts in question. 2 We expect to register these 

 bases, as well as their duration, by the aid of our electric 

 shoe (chaussure exploratrice). 



The trail shows (Fig. 196) the imprints of the poste- 

 rior feet always surpassing considerably those of the corre- 

 sponding anterior, because the space embraced by each 

 posterior member is about one-third longer than the length 

 of the lateral base. 



The length of the step of the ambling horse, according 

 to M. Lenoble du Teil, 3 would be equal to that of the ordi- 

 nary walk, say 1.80 m. for a horse of 1.60 m. at the 

 withers. 



1 Lenoble du Teil, note communique^. FIG. 196. Trail 



2 Lenoble du Teil, Locomotion quadrupede etudi6e sur le cheval ; 2e 6d., of the amble, 

 p. 53, pi. v., Paris, 1877. after Lenoble 



3 Lenoble du Teil, loc. cit., p. 58. du Teil. 



