'Lifquijttio experlmentalts, 17 



§. XXXI. 



Jam quia impreffiones debenc effe zquales , erant 



S © A =/9 /» , adeoque 9 :© == S A /J^ , & 

 quoniam fuperficies funt in racione duplicata diftantiaruin 

 à centro, five S: j = D ':^',eric >:©" =D' A" :<^- J^" 



five 9 : © = D ^^ -^ -i" ■ -^ -"^ «f" -^ , hoc eft , tranflaciones 



erunt reciproce, uti funûioncs mcmoratie five ®===F;g. viiï^ 



D — A ~~— . Comparatis nunc duorum ftratorum moti"- 



"bus angularibus POQ_& ROS codera tempore fadis , 

 exprimée TS tranflationem infcrioris ftraci , & TOS , (ive 

 TS divifiim pcr TO exponec difFcrentiam motûs angir- 

 laris. Habcbimusigicur difterencias mocuum angularium 



T s — i — m — n 



,TÔ= D — ^— A -. 



§/xXXIT. 



Fiant nunc ( ad imitationem Neutonis ) ad lineam OT 

 perpendiciilares GH , IK , = D — '~ " a ~-~ expri- 

 met area curvae: Kl F , H GF , motus totos angulares 

 = yT D ~~~^r~ ^ "^ ^^I > five ponendo D = at = 

 O G, adeoque GI = ^a.', erit motus angularis ===== 

 C ^ ~ - ~~ -^~—dx ,ôc faciendoA =D.= x'', ha. 



bebimus tandem fl^ ~^~'"S~^" dx=^ — - — x —"—f . 



c 



