be learned in a few weeks, during which time it may not be necessary to discuss the complicated combinations of colors in nature and our domestic surroundings. This is not intended to mean that the child will in this time be able to name the various hues when seen separately, but that having the eighteen paper tablets he may feel their relations to each other to such an extent as to be able to lay them in their spectrum order. Those pupils who seem to have no natural perception of the proper relationship of colors will require more experience than the rest of the class before they can be sure of their colors and the teacher must exercise her judgment in deciding how long to hold the class to this subject of spectrum hues on their account.
As in other class work it is not necessary that the dull children perfectly comprehend all that is told them at each step, because there will always be some in a class who will comprehend and thus the others may learn by observation, and in this subject particularly every step in advance must necessarily include a continual review of all that has preceded.
Consequently when a teacher has given as much time to the study of hues in the arrangement of the papers as she deems profitable, considering the entire time that can be devoted to the subject during the year, she may well proceed to tones.
It is unnecessary at the beginning to use the word tones with the children, as "light and dark" colors will be understood more clearly. The first lesson in light and shade may be given with some book bound in a bright color, as red for example, which is common in cloth bindings. For this experiment partially open the book and hold it vertically, with back toward the class, in such position that a strong light from one side of the room will fall directly on one cover while the other is in the shade. If properly manipulated this simple experiment may be made effective to an entire class by moving the book in various directions to accommodate the several members,
