saa DE PRESSlONE PONDERIS 



mate erft Er=o; ? — ^; F — ^ et /— r, hincqiic 

 ftatim obtinentur lequentcs tres actiuationes 



II. ^?— : a /5 1- -1- i.(3.^ ^ f 4- I Y Z; 6- f 



III. ^rr U^^^'f-i(36^<r-f-iY^i-,r 



Tndc fl;Ttim cor.cludimus , .i tcrtia. bis fumta fubtra- 



hendo primam 



G(^-j)-^^bbc; ergo ^bbczzeGiif-i). 



At fi a fccmida bis fumia (ubtrabatur prima , repe- 



ritur 



G(i-y^}=i',ybcc idcoque ybcc—CGCi^^i}, 

 hincque 



Nuuc pro punclo quoeunque coordinatis x ct j de- 

 finitQ , prcliio erit a H- (3 .v -i- y /. 



Coroll. I. 



34. Hinc in pundo A vbi j' 3: o et X ~ o 



prsfTio erit 



c /— «J) 6 ay 



In angulo vero B prefllo prodit 



a-|-(3^=:i^(rH^V'-y)> 

 porro preffio in C erit — a 4- y ^ — ^^ (i - V* + T^^ ' 



^enique 



prcffio in pundoD erit ^a+p^ + v<r=p-^('-/+T~ ^)' 



Coroll. 



