Huxley, who in the 9th edition of this encyclopaedia traced the history of the growth of the biological idea of evolution from its philosophical beginnings to its efflorescence in Charles Darwin.
The manufacture of glass, also practised in Egypt, demanded a knowledge of sodium or potassium carbonates; the former occurs as an efflorescence on the shores of certain lakes; the latter was obtained from wood ashes.
Wall-saltpetre or lime saltpetre, calcium nitrate, Ca(N03)2, is found as an efflorescence on the walls of stables; it is now manufactured in large quantities by fixing atmospheric nitrogen, i.e.
Another defect arising during curing and fermentation is the efflorescence of salts on the surface, a phenomenon known as " saltpetre "; light brushing and spraying with a weak solution of acetic acid are effective remedies.
The efflorescence of aboriginal pottery is to be found in the Pueblo region of south-westernUnited States, in Mexico, Central America,Caribbean Islands, Colombia, Ecuador, Peru and restricted areas of eastern Brazil.
On the Pacific coast of America the efflorescence of basketry in every form of technic was known.
Marcasite readily oxidizes on exposure to moist air, with the production of sulphuric acid and a white fibrous efflorescence of ferrous sulphate, and in course of time specimens in collections often became completely disintegrated.
Calcium nitrate, Ca(N0,)2.4H20, is a highly deliquescent salt, crystallizing in monoclinic prisms, and occurring in various natural waters, as an efflorescence in limestone caverns, and in the neighbourhood of decaying nitrogenous organic matter.
The evidence for it is not to be confused with that for the law of rapid efflorescence of groups just considered.
- Periods of gradual evolution and of efflorescence may be followed by stationary or senescent conditions.
At one time sea-water was thought to be injurious, but modern investigation finds no objection to it except on the score of appearance, efflorescence being more likely to occur when it is used.
The result of this drainless irrigation is an efflorescence of salt on the surface of the field.
A white efflorescence which appears on certain Brown Algae (Saccorhiza bulbosa, Laminaria saccharina), when they are dried in the air, is found to consist of mannite.
He pointed to the efflorescence of new forms that had come into existence under the protection of man.
The uncultivable land consists chiefly of extensive usar plains, found in the southern and western districts, and covered by the deleterious saline efflorescence known as reh.
M., and is covered by a saline efflorescence; successive crops are obtained by the action of rain and snow and subsequent evaporation.
Again, there are chambers with drifts of snowy crystals of the sulphate of magnesia, the ceilings so thickly covered with their efflorescence that a loud concussion will cause them to fall like flakes of snow.