MARGARIC a.
(soaps) with an acid. It was formerly supposed to be an individual fatty acid, but is now known to be simply an intimate mixture of stearic and palmitic acids. (b) (Chem.) A white, crystalline substance, C17H34O2 of the fatty acid series, intermediate between palmitic and stearic acids, and obtained from the wax of cer…
MARGOSA n.
h is a much more showy tree, and is cultivated in the Southern United States, where it is known as Pride of India, Pride of China, or bead tree. Various parts of the tree are considered anthelmintic. The margosa oil . . . is a most valuable balsam for wounds, having a peculiar smell which prevents the attacks of flies.…
METHYLENE n.
A hydrocarbon radical, CH2, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, CH2Br2; -- formerly called also methene. Methylene blue (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- c…
MICROMETER n.
object-glass micrometer, and when the instrument is large and equatorially mounted, it is known as a heliometer. -- Double refraction micrometer, a species of double image micrometer, in which the two images are formed by the double refraction of rock crystal. -- Filar, or Bifilar, micrometer. See under Bifilar. --…
MOLE n.
mon European species (Gryllotalpa vulgaris), and the American (G. borealis), are the best known. -- Mole rat (Zoöl.), any one of several species of Old World rodents of the genera Spalax, Georychus, and several allied genera. They are molelike in appearance and habits, and their eyes are small or rudimentary. -- Mole…
MYTH n.
A story of great but unknown age which originally embodied a belief regarding some fact or phenomenon of experience, and in which often the forces of nature and of the soul are personified; an ancient legend of a god, a hero, the origin of a race, etc.; a wonder story of prehistoric origin; a popular fable which is, or…