120 



ANIMAL MKllIAMsM. 



which lie tin- minima, and on the sides of which, the maxima 

 t 'rininati 1 tangentiully. 



i'uncnnt jimi/nx* f (//>' Imilif It is clear that during the 

 art of valkin^r, tlie body never ceases to advance; but the 

 forward movement has not always the same velocity. To 

 appreciate these alternate phases of acceleration and retarda- 

 tion, it is iieressarv to employ a method which would ^-ive the 

 measurement of the space passed thnugli during each of the 



Fio. 24.- S)i"win^ t\vii snro-;sivr |inMtii>ii> ,,t' tin- :inu nf the iii-t 



anil t h<--<- nv.Nj liii^|.-i;i t r i.-in-.' ) i> nt - of t In- K-VI-I > 1'liu 



arm i if th" li'vrr ln'in^ tlirr. rnetma in I. ii Mli, ,IM<| tin- r.i.lius nf the 

 c\lililrr In-ill^' nnly six CentimotrOR, a s : niilir :m;nil;ir ilisjilaciMin'ii' nf 

 the p'T-mi walking, an-l Hi tin 1 >tyli' *vlii -li wi\tj>, will I'linvsiH":! 1 witii 



sli.ll'c-i wllirll Will In- tn i-in-li ul MI a.s "ill tO 1. 



movements in the act of walking, and which would also 

 e\pn the time employed in passing through each of these 

 NpUCas. In older to olitain this doiilde indication, we have 

 recourse to the following method : 



It i> necessary, lir-t, to ascertain how far tin- body advances 

 at tin- dilfeiviit instants of the act of walking. This measure 

 of the spaces pa^-rd through, is obtained bv inscribing tlio 

 curves of locomotion, no longer on a cvlinder turning with a 

 Imt on an immovable our. on which the 



