3ia DE PkESSIONE PONDERIS 



r. prenio ipfa — A B (a H- ^ |3. A B -4- y. A C) 



]V. Moment. pro AB — cibc--\--„^/)te-i-yL>(,'' 

 111°. Moment. pro ACzi-fbb-{-i^b*-hlbb(;, 



III. Pro latcre AC, AE — o; At^— oi EFrroi ef—o-^ 



ct ¥ fzzc 



I. Ip(h preflio —ac-\-\ycc 



II. Moment. rcfptd:. l.ueris AB — \acc-\-\yc* 



III. Moment. rcfped. nxis A C — o, 



IV. Pro latere BD; A^-ke-b; EF-o,f/-<:,et F/:=o. 

 I. Ipfa pr. (Tu) -ziiac-^^cb-^^y cc 



IJ. Momciu. refp. lateris AB— ?/ + i(3Z'fr-f ^y/ 

 lil. Moment. rc(p. latcris AC—abc + ^cbb + lcbb. 

 Atque hiiic colli^inui> trcs fequeiucs aeqiiationes 



I. zaib + c^+^ybb-vbc^-Vyibc + cc^-G 



II. G.O?-0i{bc + cc +i(3 cb[b-\-c)+yc[bc-\\c*) 



II I. Q.kV-a{bb-\bc)-t{!>-bb[\h^'C) + \y.bc{b+c]. 

 Ex quibiis manifeflo requitiu*, pofuo OPrrg et AP::^/ 



a[b + c)-^.-^J[b\-c)~1^{.b^c) ideoque 



^, , , . G'2sr-c) 3G(^^-f) 



G(c/-0 50 2/"-^) 

 ^bbiXcm^Qif-^d, et (3/.Z.r.— .^:=— -^. 



Inucntis antem his valoribus a, (3, y , (Ticile crit 

 tam pro fi.igulis lateribus , quam pro fmgulis eo- 

 tum pundtls , prcflioncm quam lullincnt aflj.gnue. 



Pro- 



