...that in figure 3, and finally a regular octahedron, (fig. 4) ; and the last disappearing point of each face of the cube is the apex of each solid angle of the octahedron. Hence, the axes of the former necessarily connect the apices of the solid angles of the latter. By...

...a regular octahedron, the form represented in fig. 20i. The last diminishing point in each 20 2U,i 206 face of the cube is the apex of each solid angle...another cube (one of large size is preferable) and knife, in cutting, equally inclined to the faces of the cube, and we obtain, in succession, the forms...

...f. 15, then that in f. 16, and finally a regular octahedron, and the last disappearing point of each face of the cube is the apex of each solid angle of the octahedron. Hence, the axes of the former necessarily connect the apices of the solid angles of the latter. By...

...f. 15, then that in f. 16, and finally a regular octahedron, and the last disappearing point of each face of the cube is the apex of each solid angle of the octahedron. Hence, the axes of the former necessarily connect the apices of the solid angles of the latter. By...

...f. 15, then that in f. 16, and finally a regular octahedron, and the last disappearing point of each face of the cube is the apex of each solid angle of the octahedron. Hence, the-axes of the former necessarily connect the apices of the solid angles of the latter. These...

...regular octahedron, the form represented in fig. 200. The last diminishing point in each 20 20« 200 face of the cube is the apex of each solid angle of...another cube (one of large size is preferable) and knife, in cutting, equally inclined to the faces of the cube, and we obtain, in succession, the forms...

...regular octahedron, the form represented in fig. 204. The last diminishing point in each 20 20o 20i face of the cube is the apex of each solid angle of...octahedron. It is hence apparent why the axes of the cube con nect the opposite solid angles of the octahedron. pursue the same process with each of the edges,...

...means of such models, the student may trace out important relations between tlie fundamental forms. face of the cube is the apex of each solid angle of...octahedron. It is hence apparent why the axes of the cube con nect the opposite solid angles of the octahedron. Take another cube (one of large size is preferable)...

...regular octahedron, the form represented in fig. 20i. The last diminishing point in each 20 20o 204 face of the cube is the apex of each solid angle of...octahedron. , It is hence apparent why the axes of the cube con nect the opposite solid angles of the octahedron. pursue the same process with each of the edges,...

...regular octahedron, the form represented in fig. 20i. The lost diminishing point in each 20 20a 20i face of the cube is the apex of each solid angle of the octahedron. It is hence apparent why (he axes of the cube con nect the opposite solid angles of the octahedron. pursue the same process...