PRINTING n.
g typesetting and presswork, with their adjuncts; typography; also, the act of producing photographic prints. Block printing. See under Block. -- Printing frame (Photog.), a shallow box, usually having a glass front, in which prints are made by exposure to light. -- Printing house, a printing office. -- Printing ink…
RADIUM n.
ays, and gamma rays (see these terms). By reason of these rays they ionize gases, affect photographic plates, cause sores on the skin, and produce many other striking effects. Their degree of activity depends on the proportion of radium present, but not on its state of chemical combination or on external conditions.The…
RANDOM a.
e random. H. Spencer. Random courses (Masonry), courses of unequal thickness. -- Random shot, a shot not directed or aimed toward any particular object, or a shot with the muzzle of the gun much elevated. -- Random work (Masonry), stonework consisting of stones of unequal sizes fitted together, but not in courses nor…