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 4"x3".
Find middle points x and with ruler draw along and across the rectangle. With ruler extend lines A, A, A, A, J" outside rectangle. Measure 2" on lines X, X, X, X, and connect with points A, A,
A, A; and at the ends of rectangle, as shown in drawing. Cut around figure on the full lines. Score on dashed lines and fold in on the lines. No pasting. Material: Cover paper.
 
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