Lens. A prism lens. A substantially
flat piece of glass, one or both faces of which are covered with
prisms.
Light, that which gives us the sensation
of sight.
Lucical. Pertaining to the illumination
of rooms-- primarily by means of daylight.
Lucics. The science which treats of the
illumination of rooms-- primary by means of daylight.
Lucidux. Plural, Luciduxes. A vertical
prism plate which receives light from the pavement prisms, and delivers
it into the basement in proper directions.
Luxfer. Light bearing.
Minor Prism. The prism forming a small
portion of the body of a prism plate.
Major Prism. The prism forming a large
portion of the body of a prism plate.
Multi-prism. A pavement prism, the
pendant of which has lenticular back and prismatic sides.
Pavement Prisms. The prisms set in
the pavement or sidewalk, throwing the light upon the lucidux;
multi-prisms, etc.
Polariscope. An instrument which, by
the polarization of light, renders evident any strain in a transparent
body introduced between polarizer and analyzer.
Polarized Light. A ray of light whose
vibrations all lie in one plane, instead of many, is said to be plane
polarized.
Prism. Ordinarily a piece of glass
with two plane faces forming an angle with each other.
Prism Face. The side of the prism lens
containing the prisms.
Prism Lens. A substantially flat piece
of glass, one or both faces of which are covered with prisms.
Prism Plate. A series of prism lenses
glazed into one piece, commonly electro-glazed.
Prism Prescription is the statement
of the prisms needed in a window to accomplish certain results.
Prisms are known by letters.
Projection. The projection of the
canopy is the horizontal distance of the bottom of the canopy from
the vertical wall when the top of the canopy is in contact with the
wall. it is assumed, of course, that the canopy is used in this
position.
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