Heat Stroke

The meteorological conditions responsible for heat stroke are rare in Europe but common in the Mississippi Valley and states of the eastern and southern coasts of this country; in general, heat stroke occurs in river valleys and low lands.¹Inability of the air about the body to receive any more moisture because it is already so saturated, together with a high temperature of the air, are chiefly responsible for heat stroke, and this applies equally well to heat stroke caused by exposure to the sun's heat and to heat stroke under other conditions, as in hot kitchens or boiler rooms. The "wet-bulb" thermometer determinations so essential to indicate this relation between increased humidity and temperature²are unfortunately no longer a part of our daily weather reports. Less important causes are tight and heavy clothing and a too small intake of water, each preventing or lessening cooling of the