( 150 ) 
feen Sir IJaac Newton's Treatife upon that Subjed:, 
bas handled it after a manner fomewhat different. 
The Title.of the Third Treatife is Canonotechnia, 
or concerning the Conftrudion of Tables by Diffe-- 
rcnces. It confifts of ten Propofitions, moft admira- 
bly contrived for expeditious Computation of inter- 
mediate Terms in any given Series. The laft Propo- 
fition, which contains a general Solution of the whole 
Dcfign, is this ; "Datisferiei cujufcunque terminis a- 
liqmt aquidijiantihus, quorum intervalla fee an da 
fimt in a quale s quotlibetcunq\ fartes^^ro^ofitum ft 
invenire terminos interferendos. 
The Book concludes with three ftiiall Trads, con* 
cerning the Defccnt of Bodies, the Motion of Pendu- 
lums in the Cycloid, and the Motion of Projediles, 
compofed in a very natural and eafy manner. 
The Author has wrote feme other Pieces, yet un- 
publillfd, which the Editor has given an Account of 
in his Preface to the Book. 
The Reader will find every Subjed treated with un- 
common Elegance and Simplicity. 
FINIS. 
LONDON: Printed for W. and J. Innys, 
Printers to the Royal Society, at the Prince’s 
Arms the Weft End of St, Paul’/ Churchyard. 
