Fig. 27.
Fig. 28.
Fig. 29.
Fig. 30.
[Figs. 25] to [30] are to be practiced, making first the points and then connecting them by the curves to complete the figures.
When two or more students are working together, with each having a blackboard, the counting may be in concert—or a teacher could count for a class. In these line examples care should be used in making them of uniform length. There is a difference to be noted between a crooked line and a broken line, the latter being a straight line and the former deviating from it.
Square chalk crayons are the best for hand work, as lines of an even or uniform width can be drawn with them.
A very fine effect is produced by using two thicknesses of chalk, one being double the thickness of the other; the heavy lines being used on the shade side of objects will produce a good effect, giving thickness and body to the object.