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that of Laplace's Coefficients, which has for its object the expression of an arbitrary, periodic function of two independent variables, in the proper form for a large class of physical problems, involving arbitrary data, over a spherical surface, and the deduction of solutions for every point of space. The functions…

A week; a period of seven days. [R.] Sir T. Browne.

In periods of seven days; weekly. Lowell.

rently stationary, by being steadily directed to one spot during the whole of its diurnal period; also, a geodetic heliotrope.

ontract of hire with an option of purchase) in which a person hires goods for a specified period and at a fixed rent, with the added condition that if he shall retain the goods for the full period and pay all the installments of rent as they become due the contract shall determine and the title vest absolutely in him,…

he domestic horse (E. caballus), which was domesticated in Egypt and Asia at a very early period. It has six broad molars, on each side of each jaw, with six incisors, and two canine teeth, both above and below. The mares usually have the canine teeth rudimentary or wanting. The horse differs from the true asses, in ha…

A French Protestant of the period of the religious wars in France in the 16th century.

now considered that the XVIth is merely a double of the XVth dynasty, and that the total period of the six Hyksos kings was little more than 100 years. It is supposed that they were Asiatic Semites.

The hymns or sacred lyrics composed by authors of a particular country or period; as, the hymnology of the eighteenth century; also, the collective body of hymns used by any particular church or religious body; as, the Anglican hymnology.

lular organisms temporarily inclose themselves, from which they emerge unchanged, after a period of drought or deficiency of food. In some instances, a process of spore formation seems to occur within such cysts.

h drift out to sea. -- Ground ice, anchor ice. -- Ice age (Geol.), the glacial epoch or period. See under Glacial. -- Ice anchor (Naut.), a grapnel for mooring a vessel to a field of ice. Kane. -- Ice blink Etym: [Dan. iisblink], a streak of whiteness of the horizon, caused by the reflection of light from ice not y…

forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period.

The period of increasing light, or luminous phase; the waxing; -- said of the moon. Seeds, hair, nails, hedges, and herbs will grow soonest if set or cut in the increase of the moon. Bacon. Increase twist, the twixt of a rifle groove in which the angle of twist increases from the breech to the muzzle.…

The development of a disease from its causes, or its period of incubation. (See below.)

Of or pertaining to incubation, or to the period of incubation.

ck seeds are as large as swan shot. See Canna. -- Indian summer, in the United States, a period of warm and pleasant weather occurring late in autumn. See under Summer. -- Indian tobacco (Bot.), a species of Lobelia. See Lobelia. -- Indian turnip (Bot.), an American plant of the genus Arisæma. A. triphyllum has a wr…

The state or period of being an infant; the first part of life; early childhood. The babe yet lies in smiling infancy. Milton. Their love in early infancy began. Dryden.

A child in the first period of life, beginning at his birth; a young babe; sometimes, a child several years of age. And tender cries of infants pierce the ear. C. Pitt.

ssil, bivalve shells,allied to the mussels. The genus is characteristic of the Cretaceous period.

To pass between; to intervene. [Obs.] He supposed that a vast period interceded between that origination and the age wherein he lived. Sir M. Hale.