Certain pathological effects of ultra-violet radiation on mosquito larvæ and pupæ

Abstract
In the course of recent work on the possible effect the ultra-violet wave-band may have on the activation of ovarian function in female mosquitoes, it became apparent that mosquito larvae are highly susceptible to a remarkable form of injury by radiations from the unshielded mercury-arc generated by the ordinary Cooper-Hewitt vacuum type of quartz mercury-vapour lamp. This effect upon the larvae has been studied, and an attempt was made (1) to determine the wave-length of the radiations responsible for the injury by means of screens interposed between the lamp and the larvae; and (2) to ascertain the physiological and histological nature of the injury.

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