( JOO ) 
comeat, that they may (land upon Record for the benefit 
of future Ages. 
If it be obje&ed that the Water of the Ocean, and per- 
haps of fome of thefe Lakes, might at the firft Beginning 
of Things, in fome meafure contain Salt, fo as to difturb 
the Proportionality of the Encreafe of Saltnefs in them, I 
will not difpute it : But fliall obferve that fuch a Suppo- 
fition would by fo much contra# the Age of the World, 
within the Date to be derived from the foregoing Argu- 
ment, which is chiefly intended to refute the ancient No- 
tion, fome have of late entertained, of the Eternicy of all 
Things ; though perhaps by it the World may be found 
mucholder than many have hitherto imagined. 
jkceunts of ‘B 0 0 
h. Linear Perfpe&ive, or a New Method of repre» 
fenting juftly all manner of Objefts y Sec. By 
Brook Taylor, L. L,- T>. and % S. Seer. 8 vo. 
London, 171% non) .r.o'bd ea non 
•fiihnornod nfidi ulo. olnil LJijov/ \\* ■h*- At- ^ 
i i * * • ** J ^ v j ' n 
T HE Author of this Book, finding the Art of Per- 
fpe#ive to be very imperfe# in the Books that have 
hitherto been publifh’d on that Subject, thought it worth 
his while to confider the whole matter anew * and from 
a careful Examination of the Principles this Art is -foun* 
ded upon, he f has endeavoured to eftablifh ibme Theo- 
rems, by means of which the Practice of it might be ren- 
der’d more general and eafy than has yet been done. In 
order to this, at firft fight he found it neceflary to make 
u(e of new Terms of Art ; the old ones feeming not ro 
H lo \rs m 2k o bee ,*<*»« be- 
