Part

 1 Pre|       heart and of some other difficulties pertaining to Medicine,
 2 II | although I recognized various difficulties in this undertaking, these
 3 II | second, to divide each of the difficulties under examination into as
 4 II |    matter, to apply it to the difficulties of the other sciences, with
 5 II |    the examination of all the difficulties of the sciences which presented
 6 III|      solution of mathematical difficulties, or even in the solution
 7 III|       judgment respecting the difficulties which form matter of dispute
 8 V  |     time on all the principal difficulties which are usually treated
 9 VI |     satisfying myself on some difficulties belonging to the speculative
10 VI |    them in various particular difficulties, had observed how far they
11 VI | endeavors to surmount all the difficulties and errors which prevent
12 VI |      of five or six principal difficulties which I have surmounted,
13 VI |      him the solution of many difficulties of which he says not a word,
14 VI |       the explication of some difficulties, or, at least, by compliments