HADLEY'S QUADRANT. A quadrant, or, more property, octant, or sextant, for taking angles between distant objects, made on the principle, that, in reflection, the angle of n equal to the angle of reflection_ It is provided with a moveable, or index ra dius, at the arc end of which is a vernier for into tenths the divisions on the arc; and also with a plain object mirror, moveable with the index. Other mirrors for fore and back observation are then fixed on the left band limh, and sights on the right , limb, to determine at what angle the moveable and fixed minces become parallel ILiiidORRHAGE A flux of blood from I of the body.
Cm Meteorolciej.) An aqueous con cretion of irregular form, descending from the atmosphere like frozen rain, a scourge that devastates and even annihilates in an hour the richest mom. Hail-stones are seldom spherical, as their sine adds to their irregular ity, and their cavities and angles indicate sue, cessiveam*amstions. When falling in sum mer, it is caused by a confluence of winds which drive the dense vapours into the higher regions of the air, above the line of perpetual congelation ; there the hail-stones are formed, and descend by their gravity, bat often ob liquely, through the strength of the HAILING (among Mariners.) drain or
a= a &hip at a a seance Small filaments issuing from the skins of animals, depending on the skin and not on the nutriment for support. The micro scope sltows them to be triangular and depending on the form of the pores[ they issue ; and the ends, when splitinto two or three branches. A mainof hair analyzed was found to contain a thirteenth of carbonate of ammonia, a seventh of water, a fourth of oil, a fourth of gases, and me, third of only matter. Red hair differs from black, in containing red instead of blackiah green oil; and in white hair the oil is colourless, and it also contains some phosphate of mag HAIR (in Botany.) The down, or hairlike threads on the surface of plants. HAIR-GRASS- A plant, some species of which are perennials and some annuals. HAIR'S-BREADTH.A of length, !equal to the forty-eighth part of an inch.