r$3 ) 
For I was told hy a great Mafterof Horfes , who had many 
years experience of Stallion Barbs, the beft he could buy ; 
that the Eaftard Barbs jdefcending iicm the h^cEnglijh Mares 
he could obtain,wereeonflaut]y better fl]aped,and better foi* 
tlieSadle,andorherftronger fervice, than their Sjres. But I 
turn'd here afide to mxm lrelandy^ becaufe the Roc of Sheep is 
not fo ordinary in IreUn'd d^s in England^ apd they a *e nearer 
Spain and Tmgier than we are: And they are highly to be com- 
mended for their late Induftry, both in the Lirmen and Woi 1- 
len manufaftures ; which may nobly provoke mir Emulation. 
And whilft E^glmd and Ireland ftrive to excel] each other in 
good things , we draw clofer to a perfefi union, and to give 
/Irengch and affiftance to each other nuitua'ly. Sir, you having 
been long accuftonrd to bear the burthen of iifeful Inquir es, 
and to promote the common good,you'l pardon this f eedoiii 
in, c^^". 
An Accompt of fome Books. 
L 4bout the Excellemy and Grounds of the MeGHaNICaL 
HTFOTHESIS^ fome Conjiderations occdJiomUy proposed fo 
a Friend bj R.B. £• fellow of the R.Soctety, London^i 6 74* 
THis Difcourfe is annexed to another, entituled, 7he Ex- 
cellency of WEOLOGY, cmpard with NirURAL 
THILOSOPHT; which though it be not of a dired ten- 
dency to the defign of thefeTrafts, yet doth it occafionaily 
mention divers things, fit to be taken notice of by a Student 
of Natural Philofophy ; fuch as are the ufeful hints and dire- 
flions, to guide him in the making Experiments skilfully and 
warily (/.1 18 r 19;) to encourage him to the improvenent 
of Natural Philof jphy, now that the Mechanical Hypothefs is 
fufficiendy fetled , and the right Methods of Inquiring are 
found out (/^.171;) f<) inftrufl him, how injurious SyJlemAticd 
Writers are to the true fearch of is'ature ( f . 1 9 3 ; ) and what 
care is to be had of eftablifljing Fhilojophical Eypothejes 
(ptipS .) asalfo, how much remains yet to be difcover'd of 
Nature ( /^.174,176,178;) and how Philofophy hath recoiled 
b\ the Arijlotelians laying afide Mathematlcks , and difputing 
of Generals/^/. 204; ) and by whom the Experimental and 
Mathematical way of philofophizing hath been reftored amd 
brought 
