A COMPOSITE OF WHITE GLUE AND THREAD

White glue, sewing thread, aluminum foil, scissors 

Pour the glue onto the aluminum foil to make three strips, each 

On one of the strips, lay strands of thread parallel to the longer side of the strip. Lay enough strands so that they are no more than 0.5 centimeter apart. 

After the glue has thoroughly dried, separate the three strips from the foil and cut off the ends of any loose threads. Pull on the 

It s easy to stretch a layer of dried white glue until it splits in half, and it s easy to yank a single strand of sewing thread into two pieces. Combine the glue with many strands of thread, however, and the resulting composite is most resistant to breakage—but only in the directions parallel to the threads. Make this composite and test its strength. 

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