0f) 
An Account off owe Boohg.. 
1, GEOMETRIC PARS UNIVERSALIS 0 Suantitdtum Cur- 
varum tranfmutationi & menfurdinjerviens, Auth. zfACOBO 
G REG 0 RIO Scoto 7 V AT AVI I ^ iS6$. in quarto. 
Numb. 30, We gave an account of a fmall Tra£i , entitul'd 
gjuadratura Circuit <& Hyper hid in propria fua Proportion is [peck 
inventa & demon fir at a , k Jac. Gregorio Scoto 5 and intimated., 
that it would be reprinted here > and accordingly the Imprefllon 
was begun % but fince then, the Author writing to a member of 
the R. Society 1 fignifies, that it is now reprinting at Venice (and 
poflibly not without fome enlargement $) which hath caufed the 
defign tobelaidafide here. Meantime, the fame Author hath 
fent over his other Book of his own compofure alfo: in the Preface 
whereof heobferves, That the defe& of Algebra (which is moil 
manifeft in the Menfuration of Curved quantities) may in fome 
manner be fupplyed 0 if out of fome eflTential property of any Fi- 
gure there to be given a method of changing it into another Fi- 
gure (equal thereto) that hath known properties 3 and of that into 
another andfo forward, until at la ft you change it into fome known 
quantity: And he modeftly filth, that his own Treatife hath fo 
far purfued this Method, that it refufeth no particular figure yet 
confidefd by Geometry. 
After this, he anfwers fuch objections, as either have been; or 
fuch as hinifelf couldxonceive might be made againft his former 
Hook of the Quadrature of the Circle and Hyperbola. 
For fuch, as would fquare a Circle organically , or divide an 
Angle in a given ratio, he fuppofeth 5 that there is no eafier way of 
doing it, then by the common Lined guadratrix, (the proper- 
ties whereof are largely handled in Leotaudi Cyclomathia^Ln^du' ■ 
ni 5 1663, in quarto.) 
Then he difcourfeth^ that all things concerning Logarithmes 
and the Composition of Ratio's may be performed by help of a Cur- 
ved Line^ drawn through the Tops of a Rank of Lines in conti- 
nual Proportion, {landing as Perpendiculars on a right line and a t 
equal diftance 5 that the Operations performed thereby are not to 
be 
