This section is from the book "Manual Training - Cardboard Construction", by J. H. Trybom. Also available from Amazon: Cardboard Construction.

1. Construct rectangle 11⅞"X 8¼" and complete according to drawing.
2. To facilitate the cutting, the inside rectangle indicating the opening for the picture should be drawn on both sides of the cardboard. To get this drawing accurate it may be a good plan to perforate the cardboard with a pin or needle point in the corners of the rectangle and then connect the points attained on the other side of the cardboard.
3. In cutting out the Opening of the frame, make a hole with the scissors in the centre and cut on the diagonals to the four corners. Then, with the scissors held underneath the frame, always cut on the left side of the opening to be made, beginning near the centre of the line, and cut up to the corner. Having cut the four sides that way, turn the model over and repeat the same cutting from the other side.
Note. - If this exercise is being done with the scissors while reading the directions they will seem less obscure.
 
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