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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)
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roclau seit Ldisposto.
Cop. VIII.
Trochlea H8. 278. tallundem ralet eum illa fig. 277. Sed ad Formam commo
ate ellalla; et quae ad praxin acthiberi (olet.
PROP. IV
Lrochlcam ita construere, ut Pondus sit ad Vim aequipollentem, in
data Mulriplorum ratione.
Fis. 238, CL daca Mulcixtorum racio a numero Dari denominetur, (ut Dupta, Ouadeu-
pla, Sexcupla, Scc.) Funis ductarii extremum remOtius, exTra FgaTIT (puta
ad Oncuu, Clarum, Palumre, auc quiddam simile:) Si a numero Impari; (uE
Tripla, Ouincupla, Scc. aurctiam Simpla: ) cum Pondere crahendo connectatur:
Toridemque adhibeantur. Orbiculi quor innuit praecedens Propolicio. PF het
quod imperatum est. Per ibidem demonstraca.
SCTTOL TV M.
DOlTint aucem Frochlex, non cantum superne et sim perpendiculari suspendi,
ri cum ad Pondera Cursum tollenda adhibentur: sed etiam ad Fractionem
Horizontalem, scu in alio quocunque liu policam; aur eriam ad amorendum Ob.
staculum achiberi. Pollunique non modo scortim, sed et conjunctim cum aliis
Fix. 258. Organis uturpari. (OI ad fig. 258. junetim cum Freata.) Poteltque horum Or-
hanorum cum singulorum scortim (Pro sua cujusque natura,) cum limul juncto-
rum, Porencia calculo altimari.
Exempli gratia. PFoPter interpOTitam Frgatam inter A e P, Facilitatur Fractio
Ponderis in P, (seu augecur valor Virium in A,) in ratione C A ad CB; puTa, uE
3 ad 2; adeoque Vis in A ut L, aequipollebit Ponderi in P uc 3. Prem, propter in-
cerpolitam Frochleam incer P ec II, (cujus Chorda abbrevianda linc, verbi gra-
ria, quatuor,) Facilitatur Porro Tractio Ponderis H, uc 4 ad 2, respectu Virium in
P; adeoque Vis in P ut T, aequipollebic Ponderi in R uc 4; seu Vis ue 3, Ponderi
UE 12. Firoo, propter ucramque interpolicam inter A e M, tacilitatur Tractio
Ponderis in n respectu Virium in A, in ratione (3x 4 = =) 12 ad F: adeoque Vis
in A ut E, aequipollebit Ponderi in A ut r2. Sed d porro, tacilitatur Ponderis 
tractio, propter Cubjectas Sertalas lire Palangas R, S, (sire Roculas habeant capiti-
bus adjunctas ut R, sive non habeant uc S,) ob minorem exinde trictionem quam
li humi craheretur: AC, in qua ratione lic taciliracur, non ita facile est hic decer-
minare; vepoce quod dependeat a rariis materiae circumstanciis Phyficis; puta, cum
Tlumi, cum Seytalarum, cum Ponderis his proxime incumbentis, Duritie, L avore,
aliisque ejusmodi, qua prour magis minulre adtuerine, plus minulre Facilitane era-
ctionem.
Acque ad eandem Formam (mutarismutandis prout cujulque Orsani natula DO
Auitac) in aliis conjunctis Orsanis Porencia calculo aestimabitur.