yil. An Account ly David Hartley, M, B* 
F. R. S. of 2)r. Trew’s TiiffertaUon con- 
cerning the differences of a Human Body 
lefore and after Birth^ intituledy Diff. epi- 
ftolica de difFerentiis quibufdam inter ho- 
minem natum & nafcendum intervenien- 
tibus, deque veftigiis Divini Numinis inde 
colligendis. fo. Georgia Kramero infcripta. 
CumTab7iEn. Autoxc Chrijioph. Jacolo 
Trew^ Norihergi^y 17^6, 4 ^°- 
T here are, according to Dr. Trew, Two 
remarkable Obfervations, which Animal Bodies 
fuggefl, iflj That the fame general Ends are accom- 
plilThed in different Animals by all the poffible Va- 
rieties of Means, That Animal Bodies are 
Machines, which produce in themfelves all thofe 
Changes, that are neceffary for their Prefervation and 
Well-being. Thus the fame general Ends of Chyli- 
fication, Circulation, Secretion of Bile, are ac- 
complifhed in different Animals by Organs that differ 
confiderably from each other 5 and in the fame Ani- 
mal the Body of the Foetus is very different in its 
Structure from that of the Adult, at the fame time 
that this Difference is effected by the Body itfelf, each 
fubfequent Variation, the natural and mechanical 
Confequence of that which immediately preceded, 
and the Whole conducted in the beft poffible man- 
ner for the Welfare and Happinefs of the Animal. 
