What exactly are the books supposed to be protecting them from?
What’s Extra Protection Worth to You?
You get more miles from your car, more life from your engine, with Casite’s extra protection.
Casite cuts engine wear because it improves lubrication—gets oil around quickly and into the tight spots. Casite retards formation of sludge and gum . . . keeps your motor clean and free-running . . . guarantees Better Motor Performance or Double-Your-Money-Back.
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The Need to Make Things
IF, BY some miracle, you could be transplanted backward in time to the days of our prehistoric ancestors, what would be the first thing you would do?
It makes no difference whether you are a banker, a farmer, a politician, or a factory worker, your first action, assuming that you didn’t drop dead at the suddenness of the change, would be to search for food. The second would be to search for shelter both from the elements and from wild beasts. In other words, the two necessities of existence, which you now take so much for granted, would occupy your thoughts to the exclusion of everything else. Guessing what you would do after that depends on the particular kind of primeval wilderness to which you were transplanted. You might, for example, find yourself in a time and location in the past when the struggle for existence was fierce. Getting food and shelter would, in that case, occupy every waking thought until you met death under the claws of some carnivorous beast. And you wouldn’t last long, either, for only the exceptionally skillful in the art of self-preservation lived even to middle age under such difficult conditions.
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THE FLIGHT OF ATOMS PHOTOGRAPHED
By W. D. HARKINS
Professor of Physical Chemistry, University of Chicago
An atom is 2,000 times too small to be seen through a microscope and it is apt to stagger the imagination of most people to hear about photographing atoms in flight. Not so long ago an atom was spoken of as the smallest particle of matter, but now it is believed to represent a grouping of electrons around a nucleus, much in the manner that the planets arranged around the sun constitute the solar system.
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