much negleaedinduaion. Wherehe takes occafion to fpeak ofati^ 
commend that, way of finding out the Bffim^ cmks of things, caU'd 
by the newly aiention'd Lori lnftmH/i Crmk^ becaufe, like a Crofs 
erefted where more ways than one do meet, it fliews which of them 
you are to take. Which, among others, he illuftrates by ttie example 
concerning the Queftion of the Caufe of Gravity, vU. Whether it be a 
Quality inherent in bodies, or the Magnetical power of the Earth, or 
the Circum-arabient Air or ^Ether f Alledging for this purpofe an 
Experiment, feeming to him to be fueh a determining inftance as hath 
beenfpokenof-, made by MoafieurHW^m before the Royal Acade- 
my at f^r^,;and related at large by Monf. Rohault in his Trdte de 
Phyfique^ printed at P^r^ A, i6yi,panz, ch. 28. p. izz, to wbkb wc 
refer the Reader v haftning to 
The Fourth and laft part or this Book, which confiders the Powers, 
Nature, and lmraortality of the Rational Soul, and is follicitoully 
tmploy'din foiving many difficulties occurring about this matter : 
Which being a fubjeft notfo proper to the defignof thcl^eTrads, we 
fiiall here forbear to enlarge upon: 
Yi hhmtvo'i Frdncefco i^^^j concerning fome Objeftions made 
upon his Obfervations about F//?<?rj" ^ together with a Reply to that 
Letter by Meyfe C haras i Now both Printed in E^£lljh Jo r John Mar- 
tyn. Printer to the R. Society, at the Bell in St. Pmls Church yardjiOjz, 
in 80 - and formerly defcribed in thefe Tracts, viz. Nffmk66,f 20^6, 
md Nnmk 83. 4073* 
VI. De Gemmarum Origine. & Viribas Exercitatio : Autb. Roberto 
Boyle, Nobilr Anglo. This Traft was alfo formerly, when it firft came 
abroad in E^^/(/^, defcribed, viz, in 84. p. 4095. and is now 
mention^ again , only to give notice to Forrainers, that *tis printed 
in Zrff^i«for the fame Bookfeller , for whom was printed the Englifli 
Edition. 
Errata in this TraEl, 
Pag, 5c53„ 1. 1% utnitifriftim, p.$o55. L25..r. 'vthkh. 
LOM-DOM, 
PrM for John Mmyn, Printer to the J^e^al Society , Up^ 
