The arrangements consisted in this instance in giving the infant a comfortable sitting posture, kept constant by a band passing around her chest and fastened securely to the back of her chair.

Her arms were left bare and quite free in their movements.
Pieces of paper of different colours were exposed before her, at varying distances, front, right, and left.

This was regulated by a framework, consisting of a horizontal rod graded in inches, projecting from the back of the chair at a level with her shoulder and parallel with her arm when extended straight forward, and carrying on it another rod, also graded in inches, at right angles to the first.

This second rod was thus a horizontal line directly in front of the child, parallel with a line connecting her shoulders, and so equally distant for both hands.

This second rod was made to slide upon the first, so as to be adjusted at any desired distance from the child.