GEOMETRICAL MUSIC.
· A point, my boys, is that which has no length, breadth, or dimension. —— A line has length, and yet is but a point drawn in extension. All lines have names expressing some distinguishing particular. As: horizontal, parallel, oblique, and perpendicular.
Chorus of Pupils. Oh! dear! oh! A pretty science mathematics is to know.
The lines called parallel are those which, drawn in one direction, Continued to infinity, will never make bisection. The thing perhaps sounds odd, but if you entertain a doubt, boys, I’ll draw the lines, ——— now take your slates, and work the problem out, boys.
Chorus of Pupils. Oh! dear! no! We readily believe it, Sir! since you say so!
[155.] In this figure rub out eight lines, and leave two squares. No side nor angle of any square must be left, otherwise that will be counted as a square.