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Fine lines ruled on glass in a series of groups of different closeness of line, and used to test the power of a microscope.

One of a group of metameric hydrocarbons C9H20 of the paraffin series; -- so called because of the nine carbon atoms in the molecule. Normal nonane is a colorless volatile liquid, an ingredient of ordinary kerosene.

A hydrocarbon of the paraffin series, a white waxy substance, C19H40; -- so called from the number of carbon atoms in the molecule.

Any one of several metameric unsaturated hydrocarbons (C9H14) of the valylene series.

Any one of a series of metameric, unsaturated hydrocarbons C9H18 of the ethylene series.

Of, pertaining to, or designating, an acid of the aromatic series obtained from opianic acid.

A method of excavating, as in a bank, by a series of cuttings side by side. See also Gulleting.

To give or apply a number or numbers to; to assign the place of in a series by order of number; to designate the place of by a number or numeral; as, to number the houses in a street, or the apartments in a building.

se billiard balls, to strike them gently and so as to keep them in good position during a series of caroms.

d and growth promoted. "Fair Padua, nursery of arts." Shak. Christian families are the nurseries of the church on earth, as she is the nursery of the church in heaven. J. M. Mason.

In the broadest sense, a process or series of processes by which the living organism as a whole (or its component parts or organs) is maintained in its normal condition of life and growth.

ing fitted with instruments for making systematic observations of any particular class or series of natural phenomena.

Any one of a group of metametric hydrocarcons (C8H18) of the methane series. The most important is a colorless, volatile, inflammable liquid, found in petroleum, and a constituent of benzene or ligroin.

A colorless liquid hydrocarbon of the octylene series, occurring in Caucasian petroleum.

Any one of a series of metameric hydrocarbons (C8H16) of the ethylene series. In general they are combustible, colorless liquids.

a complex mixture of the ethereal salts of several of the higher acids of the acetic acid series. It has an ethereal odor, and it used in flavoring artificial wines and liquors. Called also oil of wine. See Essential oil, under Essential.

A suffix denoting that the substance in the name of which it appears belongs to the series of alcohols or hydroxyl derivatives, as carbinol, glycerol, etc.

f Mexico, covered towards the top with long white hairs. -- Old red sandstone (Geol.), a series of red sandstone rocks situated below the rocks of the Carboniferous age and comprising various strata of siliceous sandstones and conglomerates. See Sandstone, and the Chart of Geology. -- Old school, a school or party be…

Olefiant gas, or ethylene; hence, by extension, any one of the series of unsaturated hydrocarbons of which ethylene is a type. See Ethylene.

ining to, derived from, or contained in, oil; as, oleic acid, an acid of the acrylic acid series found combined with glyceryl in the form of olein in certain animal and vegetable fats and oils, such as sperm oil, olive oil, etc. At low temperatures the acid is crystalline, but melts to an oily liquid above 14…