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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica (shelfmarks Leibn. Marg. 100:1/2, Stück 1; Leibn. Marg. 100:1/2)
# Folio 702, page id 851387705:0722
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ut.
Cap. V.
bor Parallelos lal e cumteripei AD Bs cst uc, 2 243; Cen.
vero elaricaris a Verrice A S. distat 2. Alcirudinis,
jus; Parallegrammi cenerum a verrice diltat,
injo: Frgo illius ae hujus distanciam, u = ad =;
vel, ut 6 ad 5. A deoque propter plani
magnicudinem ad magnicudinem, uc 2
act 3; ee Centri diltanciam ad dictan-
tiam, uc 6 ad5; Frit Solidum ex con-
vertione temiparabola ABD, ad CylindTuM Cx COnVer.
tione ADBS, circa eandem AS; in cacione ex ilis com.
Dolita, ut 12 ad 15, vel 4 2d5.
Fadem E converta incelligatur eiica BD; (unde Cen-
trum Cravicacis distac = alricudinio; adeoque ad distanciam. Cencri
Cravicaris parallelo srammi eneum leripii, ut = ad =; sive ut 4 ad 5;
et magnicudo ad magnicudinem ut 2 2d.
cum leripeum Cytindeum, erie ut 8 ad 25.
id Solidum convertione lactum, ad cir.
Fadem cirea AD converla; PropteE magncudinem, ut prius, Scuc 2 ad 3:
2
e distantiam Cenri eraricatis ad AD,  L acicudinis, adeoque
12 2 ad distantiam inde Ceniri gravicaris parallelogrammi circum.
teriptis, ut 3 ad 4: per 8 hujus:) solidum facier, ad Cslincrum
cireum (eriprum; u16 ad 12, vel + ad 2.
Eadem denique circa BS, (unde Cenrrum pcavicacis distac  laciuidinis; adeo.
5, 1LXO, 15 que ad distantiam Ceneri graricaris parallelogrammi ut 5 ad 4;
4 126
ee magnicudo ut prius;) solidum facier, ad circumleriprum
Cylindrum, uc 10ad 12; vel 5 2d6.
Arque eodem plane modo taciendum esset, ctiamli rectae AS, SB, AD, DB,
non adjacerent, sed in remora distantia, vel etiam obliquo quoris litu, utcunque
in eodem plano; dummodo tixuram converiendam non seCEt exPOLITUS CONVeE.
Tionis AXIS.
Et Amiliter quaecunque exponatur figura planaq cirea rectam quamvis in co-
dem plano (quae illam non Lecet) urcunque politam converrenda. Ouodque de
licura plana dictum, de linea quaris in plano desexipca, similiter convercenda in.
telligatur.
Keliqua consectaria, in ipso propolicionis curriculo facis demonstrantur.
SCTO L ZV M.
TAnc mechodum cum ance plures annos inveneram (neseius id prius inno-
Lcuiste) inveni randem Forricellio, aliisque post illum, prius tuiste, nocam.
Si vero Figura conversa, non sic Plana, vel non in eodem Plano cum Conver-
sionis AXC, (quod et de Lineis similitex incellise:) pro converta, substienda
es alia (in eodem plano cum AXC) inquam, Converla, sic projecta incelligatur,
uc veriulque respectira Puncta sinsula cancundem distent a conrertionis AXe.
3 
De Calculo Centri Cravitatis.