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HERTIG SOLVES MYSTERY OF DEATH VALLEYS IN ANDES

A belt of poison night where death strikes at dusk is being studied by Marshall Hertig, assistant professor of medical entomology new in the service of the Peruvian government.

Reports of the Pan-American Sanitary Bureau review his work in solving a mystery which has baffled medicine since it first was reported by a Spanish doctor in 1930.

The death-belt consists of a few narrow valleys on the Western slope of the Andes from an elevation of 1000 to 2600 meters over an arid desolate and sparsely inhabited country. Nearly every one who spends a night here is affected a few days later with a severe anemia which often proves fatal. The red blood cell count may drop at the rate of a million a day.

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