An Elementary Study of Chemistry

by William McPherson; William Edwards Henderson

1. Isometric or regular system (Fig. 46). Three equal axes, all at right angles.

Fig. 46

2. Tetragonal system (Fig. 47). Two equal axes and one of different length, all at right angles to each other.

Fig. 47

3. Orthorhombic system (Fig. 48). Three unequal axes, all at right angles to each other.

Fig. 48

4. Monoclinic system (Fig. 49). Two axes at right angles, and a third at right angles to one of these, but inclined to the other.