Transfer from Opaque Paper. Whenever necessary to make a transfer from a piece of paper that is not transparent, the reverse drawing (the lines which make the offset) can be made by placing the paper against a window pane, which will cause the paper to appear transparent, when the lines may be traced.
Interesting and Practical Experiment. When it is necessary to make the transfer in contact with any certain part of the drawing this can be accomplished by placing the paper near the desired place and then rapidly lifting and lowering the transfer until the part on the transfer and the part on the drawing underneath appear as one. The phenomenon is similar to the principle on which moving pictures are based.
To illustrate the experiment make the drawing A in Fig. I. Then another drawing B, which place over A. Then move up and down very quickly, as indicated in Fig. 2, in the directions as shown by the arrows F and F. Bring C towards you from D sufficiently far that the eye may see A as well as B. If moved with sufficient speed, A and B will appear as they do at the left of Fig. 3.

REVERSING DESIGNS
For the purpose of making both halves of a design precisely alike fold a thin piece of paper and on one side draw half of the design. Then fold again and by rubbing briskly on the back of the paper with any hard substance, the design will even appear sufficiently legible to be penciled over. It can then in turn be transferred to paper that is not creased. The method is shown in Fig. 8. The heavy lines represent the half first drawn, while the dotted lines show the folds and transfer. If the subject is a wreath an initial may be added. In the upper right-hand corner is shown half of a "B" started in this manner.

Fold a piece of paper in the middle (Fig. 9). Draw half a butterfly on one side of the fold; transfer it. Pencil the trans-

fer. A very pretty and interesting variation of this exercise consists in using colored chalks instead of pencil, and then intensifying the transfer.