No coin nor oath required. For personal study only.
In each test a series of pans containing known numbers of larvae were distributed over the area to be dusted. Counting the living larvte after dusting furnished a check on the effectiveness of the application.
Two final-tests gave particularly clear-cut results, and for this reason were of special interest in showing the possibilities of this method of control in breeding areas of the type represented, the lakes overgrown with aquatic vegetation and having an abundance of Anopheles larvae well distributed throughout. In the first of these a larval reduction of 88 per cent. occurred as a result of the treatment, and in the second more than 99 per cent. were killed. The only larvae remaining in the second instance were a few of the smallest size, found, in one small spot.
๐ SIMILAR VOLUMES
## 822 CURRENT TOPICS. [J. F. I. results are confirmed at different places, then all our theories go into the melting-pot, relativity and all, and a patient resurvey must commence to unravel afresh order from chaos. The only grave mistake we can make at present is to treat Miller's results other
work of Maxwell and on the experimental work of Hertz. This tribute to the latter was not relished by Ludwig Boltzmann, who rose and took exception to parts of the address, it seems that the physicists of Germany were not too well acquainted with the fundanlental work of Maxwell and that Hertz wrote