GOODS & SERVICES
Adjustable Battery. Willard Storage Battery Co. announced that it will soon put on sale a new auto battery with a special plastic gadget to adjust the water according to the seasons. More water in summer cuts acid deterioration, the company said, and less water in winter gives the battery more pep.
Cockpit Listener. North American Aviation, Inc. has developed a tape recorder no larger than a portable typewriter, which can log the conversation of a plane's crew for ten hours, and at the same time keep a running record of pressure,...
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