INDEX n.
of incidence is double the sine of the angle of refraction. -- Index plate, a graduated circular plate, or one with circular rows of holes differently spaced; used in machines for graduating circles, cutting gear teeth, etc. -- Index prohibitorius Etym: [L.], or Prohibitory index (R. C. Ch.), a catalogue of books wh…
LEVEL n.
osition of a bubble in alcohol or ether contained in a nearly horizontal glass tube, or a circular box with a glass cover. -- Surveyor's level, a telescope, with a spirit level attached, and with suitable screws, etc., for accurate adjustment, the whole mounted on a tripod, for use in leveling; -- called also leveling…
LIVE a.
. chrysolepis and some other species are also called live oaks. -- Live ring (Engin.), a circular train of rollers upon which a swing bridge, or turntable, rests, and which travels around a circular track when the bridge or table turns. -- Live steam , steam direct from the boiler, used for any purpose, in distinctio…
MANGLE n.
lothing, by roller pressure. Mangle rack (Mach.), a contrivance for converting continuous circular motion into reciprocating rectilinear motion, by means of a rack and pinion, as in the mangle. The pinion is held to the rack by a groove in such a manner that it passes alternately from one side of the rack to the other,…