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low a current of air both inside and outside of the flame. Argand burner, a burner for an Argand lamp, or a gas burner in which the principle of that lamp is applied.

ral luster. I. Taylor. Some astral forms I must invoke by prayer. Dryden. Astral lamp, an Argand lamp so constructed that no shadow is cast upon the table by the flattened ring-shaped reservoir in which the oil is contained. -- Astral spirits, spirits formerly supposed to live in the heavenly bodies or the aërial regi…

pe, with very small, acid berries. -- Frost lamp, a lamp placed below the oil tube of an Argand lamp to keep the oil limpid on cold nights; -- used especially in lighthouses. Knight. -- Frost nail, a nail with a sharp head driven into a horse's shoe to keen him from slipping. -- Frost smoke, an appearance resembling…

A contrivance for causing a current of air to impinge on the flame of the Argand lamp; -- called also oxygenator.

ar flowers (Bot.), flowers which open and shut daily at certain hours. -- Solar lamp, an argand lamp. -- Solar microscope, a microscope consisting essentially, first, of a mirror for reflecting a beam of sunlight through the tube, which sometimes is fixed in a window shutter; secondly, of a condenser, or large lens,…