This section is from the book "Manual Of Cardboard Construction For Third And Fourth Grades", by Charles A. Kunou. Also available from Amazon: Manual of cardboard construction for third and fourth grades.
Draw a rectangle 10"x3". Draw a line across in the middle. Draw a line across 1" from one end of rectangle. Draw a square of 1" sides as shown in drawing. Draw supporter A according to drawing. Cut around figure, and cut out the square. Score on middle line and fold on it. Roll part B forward and upward as shown in sketch. Fasten sides of frame with floss and bend supporter backward as shown in sketch. Material: Tagboard or bristolboard.


For front piece, draw rectangle 4"x5", on bristolboard.
Draw inside rectangle 1" from sides.
Draw diagonals.
Cut around figure and on diagonals.
Roll points forward and upward as in sketch.
For back piece, make rectangle on tagboard same as front piece.
Draw, cut, and bend back support 3"xl" as shown in sketch.
Fasten back piece to the front with eyelets.
No scoring on this model.


On bristolboard draw circle 4" diameter. Draw diameters, as in drawing.
Measure ½" on both sides of vertical diameter and at any distance above and below horizontal diameter; obtaining points A, B, C, D. Draw lines A, C, and B, D, indefinitely, as in drawing. Measure ½" below and above horizontal diameter and draw cross lines, completing a square of 1" sides. Draw diagonals.
Cut around circle, and in diagonals of square. Roll triangular pieces 1, 2, 3, 4, outward as in sketch. For back:
On tagboard draw and cut a circle same size as first. On tagboard draw and cut piece 2½"x l" for supporter of frame. Fasten with floss the three pieces together at the top; and back and front fastened together at the bottom, as shown in sketch. Materials: Bristolboard and tagboard.


 
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