AXIS n.
oss section of a girder. -- Optic axis of a crystal, the direction in which a ray of transmitted light suffers no double refraction. All crystals, not of the isometric system, are either uniaxial or biaxial. -- Optic axis, Visual axis (Opt.), the straight line passing through the center of the pupil, and perpendicula…
CHAIN n.
arp threads of a web. Knight. Chain belt (Mach.), a belt made of a chain; -- used for transmitting power. -- Chain boat, a boat fitted up for recovering lost cables, anchors, etc. -- Chain bolt (a) (Naut.) The bolt at the lower end of the chain plate, which fastens it to the vessel's side. (b) A bolt with a chain att…
CONDUCTIVITY n.
The quality or power of conducting, or of receiving and transmitting, as, the conductivity of a nerve. Thermal conductivity (Physics), the quantity of heat that passes in unit time through unit area of plate whose thickness is unity, when its opposite faces differ in temperature by one degree. J. D. Everett. -- Thermo…