Mifeettanea Curt of a. i 7 



49. This becaufe of tjl^ 



£ a =R*-SS&r the Sines ^-R~ir 



S, in Arithmetical Pro- _ 



greflion) is reduced (by j r _S£ 

 divifion) into this Infi- R 

 nite Series. , |4 



K ^R+k3+.r; , «^ 



n i 



50. That is/ putting R= i.y 1 %j 



i^.ffifr&i &c. 



5 1 - Then ('according to the Arithmetkk of 

 Infinites; we are to interpret S, fucce (lively, by 

 1 S, 2 5, 3 5, &c. till we come to S, the great- 

 eft, Which therefore reprefents the number 



of All. , , , 



52. And becaufe the fir.ft Member doth re- 

 prefent a Series of Equals ; the fecond of Se- 

 cundans the third, of Quartans, &c. There- 

 fore the firft Member is to be multiplied by 

 the fecond, by f S > the third, by f 3 ; the 

 fourth, by j S i &c 



<3. Which makes the Aggregate, 

 S+! S'+ ; S' h \ S 7 +' 9 S% &-E CL.M, 

 Fig* 9» 



54. This (becaufe S is always lefs than R = 

 1) may be fo far continued, till, fome power of 

 S become fo fmall as that it (and all which 

 follow it; may be fafely negleded. 



55. Now (to fit this to the Sea-Chart, ac- 

 cording to Mr. Wright's defign : ) Having the 



G propo- 



