Scientific Serial

Abstract

American Meteorological Journal, April.—Ice columns in gravelly soil, by Prof. C. Abbe. During spring and autumn little slender columns of ice are found at the surface of gravelly soils in moist places after a clear cool night, and the surface layer is found to be raised up an inch or two. Prof. Abbe offers an explanation of the phenomenon, which differs from that given by Leconte and others. The subject is of some importance to agricultural soil physics.—The diurnal variations of barometric pressure, by C. J. Lyons, of the Hawaiian Weather Bureau. The author takes into account the expansion of the air both upwards and laterally, caused by the apparent motion of the sun, and he considers that it is the lateral pressure that causes the barometer to rise to a maximum about half way between local sunrise and local maximum of temperature.