Geometrical InflniBionsy &c. " i 



^ .^ .^ ^ .!^ c-^M^ .% .^ -^^ ^^j?.;^,;.^.*.^ ^ ,f, ^5 ^ * 



&^ oTo u.o t ?to JJtJ 'jltJ 6To d;« i''. O c'.O t*<^?6r.*J OTO e!;.^^ 



Ti?^ Defijiition of a Toiri^l'^^ahcl iBe J^c/tjop 

 : . . thereof, a Line. '■[ 



§ I. ^^ Point is generally put as the firfl: Piindple 

 l\. in the Mathematicks, and that which of 

 it felf has no Part or Parts. : ■ > . 



. And by this we underftand,-,that the Pdiiithath 

 neither Length, nor Breadth, nor Depth ^ and. that 

 alfo 'tis not fenfible, but only intelledual, . feeing 

 there is nothing which falleth under Senfe, which 

 hath not a Quantity-, and that.'there is no. Quan- 

 tity without Parts, Which would altogether ;con- 

 .tradid: this Definition. Neverthelefsyas nonferaii 

 make any Operation, but by the Interpofitibh I bf 

 corporeal Things, they reprefent therefore the Ma- 

 thematical Point, by the Point *.Ph3^iical, which /as 

 the Object of the Sight, the, fsnalleft aiid leaft divi- 

 fible to our Senfe, and is made with the Point of a 

 Needle, or with the End or Point of a Compa'S or 

 Pencil, 35 the Point noted by A.. . 



The Point central, or Center^ is a Point by 

 which a Circle is drawivj-ojt rather.it is the midft 

 of a Figure, as C. -^ 'Ml J I I i \{-^:m^\ \ 



■ The Point fecant, is a Point where the Lines 

 do divide themfelves, and whichds ordinariljr^eaird 

 a Sedion, as B B. *• oiS'V 



B A B 



p<: 



Vol. II. ^ 



