[ §7 ] 
II. An Account by Mr. John Eames, F. R. & 
of a Book enfttukJj A Mathematical Trea- 
tife, containing a Syftem of Conic-SedlionSj 
with the Doctrine of Fluxions and Fluents* 
applied to various Subjects. By John 
Muller. 
T HE ingenious Author of this Work, obferving 
how much Time is neceffarily fpent, and Pains 
taken, in learning thefe valuable Parts of Mathematics, 
thought it would be very well worth his while to lefleiv 
both, which he hopes he has done confiderably, in 
the following Treatife. He has divided it into three 
Parts, contained in fo many Books. 
In the firft of thefe, he confiders the Properties of 
the three Sections of a Cone, as well in, as out of the 
Cone. And to make this Part of the Work of more 
Service to the Reader, Mr. Midler has not only fe~ 
le&ed the mod: confiderable Properties of thefe Curves,, 
that are to be met with in other Writers, both An- 
cient and Modern; but has added feveral new ones,, 
which, as he informs us, are inferred in their proper 
Places. And that fuch Gentlemen as are defirous to 
read Sir Ifaac Newtons, Brmcipa? but are at a lofs 
for W-ant .of a fufficient Acquaintance with Conic- 
Sections, may be the more obliged, he has taken parti- 
cular Care to demonftrate fuch Properties as Sir Ifaac 
prefuppofes his Reader to be acquainted withal. Ac- 
cordingly, he has prefix'd a Table of fuch Proportions, 
inforining him as well where they are to be met with 
im. 
