475 
OzsservATions on the Nervous Sys- 
TEMS Of “DIFFERENT ANIMALS; on 
Oricinau Derecrs in the Nervous 
System of the HumAN Specizs and 
their INFLUENCE on SENSATION and 
_ VoLuntrary Motion. 
BY JOHN HULL, M.D, 
READ NOVEMBER 28th, 1800.* 
“ Le mécanisme des sensations, le Tapport des nerfs avec le sujet 
senti 4 la surface du corps & avec le centre, ou se réunit le senti- 
ment, sont aussi obscurs, qu’ ils l’ ont toujours été, malgré tous les 
faits, qu’ ona recueillis depuis plusieurs siecles,’? Fourcroy Syst, 
des Conn. Chim, T, 1X. p. 348; 
I, another publication I have enumerated some 
of the most remarkable deviations from the natural 
form, that have been observed in human fetuses 
on the side of excess, both in the number and. 
proportion of their parts. Astonishing as these 
may appear, the deviations on the side of defect 
are not less so and the latter are perhaps more 
particularly interesting to the anatomist and phy- 
siologist, as serving to point out the compara- 
tive necessity of the different parts, concerned 
in the performance of the various functions of 
* ‘Some additions have been made to this paper, since 
it was read to the society, 
