rchipelago, by light only at certain periods of its existence. In regulating the clocks of the Pennsylvania Central and discovered over half a century ago by one of the Frank- winged ants, for example, the period coincides with the other railroads associated with it, a system then com- lin search… … experimentally that the maximum heat in the normal exploration, however, will not begin until the spring spectrum lies in the orange and not in the infra-red of 1908. spectrum, aS commonly supposed. Before the inven- "2+ ___————_ tion of the bolometer the distribution of heat in the THE MOTH AND…
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