 | John Playfair - 1855 - 350 sider
...aright the definitions of a point, line and superficies ; for these all arise from a solid, and exist iu it ; The boundary, or boundaries which contain a solid, are called superficies, or the boundary which is commo%to two solids which are contiguous, or which divides one solid into two contiguous parts, is... | |
 | John Harris - 1875 - 296 sider
...aright the definitions of a point, line, and superficies ; for these all arise from a solid, and exist in it. The boundary, or boundaries, which contain...into two contiguous parts, is called a superficies : thus, if BCGF. be one of the boundaries which contain the solid ABCDEFGH., or which is the common... | |
| |
It is necessary to consider a solid, that is, a magnitude which has length, breadth, and thickness, in order to understand aright the definitions of a point, line and superficies ; for these all arise from a solid, and exist in it ; The boundary, or boundaries... 
