It often passes into an earthy form, termed soft red ore, and when mixed with more or less clay constitutes red ochre, ruddle or reddle (Ger.
In the routine examination of crude petroleum it is customary to determine the specific gravity, and the amount of water and earthy matter in suspension; the oil is also frequently subjected to a process of fractional distillation in order to ascertain whether there has been any addition of distilled products or residue.
Many of the freshwater algae which form a mere crust, such as Palmella cruenta, may be placed in a vessel of water, where after a time they float like a scum, the earthy matter settling down to the bottom, and may then be mounted by slipping a piece of mica under them and allowing it to dry.
Physical symptoms also appear; the face assumes an earthy colour, the body wastes, constipation is usually present to an extreme degree, the secretions become arrested, loss of appetite and indigestion follow and the mouth is parched.
If the finer earthy sands only are obtainable, they must be rendered sharper by washing away the earthy particles.
Sand is by itself of little value except for striking cuttings, for which purpose fine clean sharp silver sand is the best; and a somewhat coarser kind, if it is gritty, is to be preferred to the comminuted sands which contain a large proportion of earthy matter.
The specific gravity is low when not brought up by an excessive amount of earthy matter.
Oh, grassy glades! oh, ever vernal endless landscapes in the soul; in ye,--though long parched by the dead drought of the earthy life,--in ye, men yet may roll, like young horses in new morning clover; and for some few fleeting moments, feel the cool dew of the life immortal on them.
The element is melted, either by the heat of its own combustion or other means, and runs off from the earthy residue.
The colour varies from earthy brown to blackish, and the greater part of the body is thinly covered with hair, and the ears and tail are fringed.