1 Crime has its own cycles, magazine some years ago. Police records that were studied for five years from over 2,400 cities and towns show a surprising link between changes in the seasons and crime patterns. July and August,as do rape and other violent attacks. Murder,moreover, is more than seasonal it is a weekend crime. It is also a nighttime crime: 62 percent of murders are

In the early days of sea seamen on long voyages lived exclusively on salted meat and biscuits of them died of scurvy(坏血病), a disease of the blood which causes swollen gums, livid white spots on the flesh and general exhaustion. On one occasion in 1535, an English ship arrived in Newfoundland with its crew desperately ill. The mens lives were saved by Iroquois Indians who gave them vegetable leaves to eat. Gradually it came to

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