Manual training--play problems; constructive work for boys and girls based on the play interest (1917)
Marten, William Samuel, 1877- · New York : The Macmillan company · leaf 131
102 MANUAL TRAINING — PLAY PROBLEMS … ANIMALS WITH MOVABLE PARTS. Figs. 1 and 3 show pos- sibilities of cam movements made with a brad nailed to the axle. Fig. 2 shows a balancing or pendulum effect. In Fig. 1, the head pivots on the far end with the cam action in the middle part. In the photograph, the second figure on the top row…
Manual traning -- Methods and manuals · Toys · Games
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
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