[19] The testing apparatus may be obtained from any textile manufacturing company, such as Alfred Suter, 487 Broadway, New York.

[20] A cam is a device consisting of a special shaped wheel attached to a machine to give a special kind of motion or movement.

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EXPERIMENTS

Experiment 1—Construction of Cloth

Apparatus: Pick glass, dissecting pin,[21] foot-rule.
Materials: 4 square inches of burlap.
References: Textiles. See page [54], Weaving; page [1], Fibers.

Directions

1. Look at the cloth under the pick glass and describe the appearance and structure of its interlacing threads, called weave.