Bird Song and Weather.—Changes in weather, and especially sharp frost or snow, influence the amount of bird song, but the influence is different upon different species. H. G. Alexander has made ...

It will be remembered that there was first sharp frost with heavy snow-falls, then a few days thaw, and then again sharp and prolonged frost. The effect of this, no doubt, was to seal the chalk ...

EXPECT a sharp frost on Pluto for the next 100 years. That is the forecast from an analysis suggesting the dwarf planet’s atmosphere has reached maximum pressure and will begin freezing nitrogen ...