. A civic biology : presented in problems. Biology; Sanitation. 220 THE ECONOMIC IMPORTANCE OF ANIMALS in tiie Canal zone, where the mosquito (stegomyia) which carries yellow fever exists. This is due to the experiments during the summer of 1900 of a Commission of United States army officers, headed by Dr. Walter Reed. Of these men one, Dr. Jesse Lazear, gave up his life to prove experi- mentally that yellow fever was caused by mosquitoes. He allowed himself to be bitten by a mosquito that was known to have bitten a yellow fever patient, contracted the disease, and died a martyr to science. Ot
. A civic biology : presented in problems. Biology; Sanitation. 220 THE ECONOMIC IMPORTANCE OF ANIMALS in tiie Canal zone, where the mosquito (stegomyia) which carries yellow fever exists. This is due to the experiments during the summer of 1900 of a Commission of United States army officers, headed by Dr. Walter Reed. Of these men one, Dr. Jesse Lazear, gave up his life to prove experi- mentally that yellow fever was caused by mosquitoes. He allowed himself to be bitten by a mosquito that was known to have bitten a yellow fever patient, contracted the disease, and died a martyr to science. Others, soldiers, volunteered to further test by experiment how the disease was spread, so that in the end Dr. Reed was able to prove to the world that if mosquitoes could be prevented from biting people who had yellow fever the disease could not be spread. The accompanying illustration shows the result of this Notice the difference in the number of yearly knowledge for the city of deaths from yellow fever before and after prQ,,Qr,o ~pYir XT-PITX H«i- ,1 • ,. r TT Xld Vctllcl. -L UI yCcllO iJ-tl the American occupation of Havana. vana was considered one of the pest spots of the West Indies. Visitors shunned this port and commerce was much affected by the constant menace of Carrier of Yellour rei/er discovered. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hunter, George W. (George William), 1873-1948. New York : American Book Company
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