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recent book, “Vacationland, U.S.A.”.

Science Plus Pleasure

Though he goes underground in search of rare blindfish and similar specimens, Mohr insists: “I do not endure the cramped miseries of playing mouse in a blacked-out Swiss cheese merely for the sake of science. I enjoy caving, along with thousands of others--teen-agers, housewives, businessmen.”

All that’s necessary to become a spelunker, Mohr writes, is “a hard hat, dependable light, and good company.” Spelunkers-the word is derived from the Latin, spelunca, meaning cave-follow a cardinal rule: Never go underground alone.

“They do not fear the collapse of a cave; the formations are remarkably stable,” Mohr says. “Dangers lie in human negligence and faulty equipment.”

Spelunkers use nylon rope capable of holding up to one ton. Mohr recommends taking along a

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