After the measurement of surfaces, rectilinear or not, it is proper to proceed to solid bodies, the surfaces of which we have already measured in the preceding book, surfaces plane and spherical, conical and cylindrical, and irregular surfaces as well.
Pagkatapos ng sukatan ng ibabaw, rectilinear o hindi, ito ay tamang na magpatuloy sa solidong katawan, sa ibabaw ng kung saan kami ay sinusukat sa mga naunang libro, ibabaw eroplano at pabilog, alimusod at bumbong, at lubak-lubak ibabaw rin.