CORPORATIONS: The Teaching Machines

To its 5,000 salesmen across the U.S., Grolier Inc., publisher of America's oldest encyclopedia, last week handed out an odd-looking new product to sell door to door. A green, windowed, sheet-metal box slightly larger than a typewriter and weighing 7½Ibs., the new product is a teaching machine. Grolier salesmen will sell it along with The Book of Knowledge and the Americana as a help to home learning, but the ultimate stakes are much higher. Grolier President Edward J. McCabe Jr. hopes it will be the first big step toward revolutionizing the $300 million-a-year textbook industry. Says he: "The first educational...

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