Science: Ingenious Waves

Curious new uses for familiar vibrations :

> Sound waves from an ordinary auto horn can be used to increase the rate of gasoline distillation by agitating the air in which the condensing molecules and droplets hang. Hence smaller cracking equipment and lower costs are claimed by the patentee of the process, Shell Development Co. of San Francisco. If the blare hurts nearby ears, inaudible supersonics will serve as well.

> Radio waves can be used to dry artificial silk as it is spun out of cellulose and reeled into hollow spools. Dried formerly with...

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