prionotus

[Pref. prio ( n )-, and Gr. nõtos = the back.] 1. Entom.: A genus of Bugs, family Reduviidse. Prionotus serratus gives an electric shock. 2. Ichthy .: One of the three groups into which the genus Trigla is divided. Palatine teeth are important branch of printing. Printing in its earliest form consisted in taking impre ions from engraved blocks. [BLOCK-BOOKS, BLOCK-PRINTING.] The use of separate types was invented by Guttenberg, of Mentz, about the year A. D. 1450. In company with Faust and others he printed several works with wooden types and wooden blocks. These were the Alexandri Galli Doctrinale and Petri His pan i Tract at us in 1442, and subsequently the Tabula Alphabetic a, Catholicon, Donuti Grammatic a , and the Confe ional i a , between the years 1444 and 1450. In the years 1450-55, the Bible of 637 leaves was printed by Guttenberg and Faust with cut metal types. Guttenberg died in 1468, in high honor for his genius and perseverance. Faust, after di olving partnership (1455) with Guttenberg, became allied with Schoeffer; and they published in 1457 the Codex Psalmorum with metallic types the most ancient book with a date and inscription. Cast metallic types were invented by Schoeffer in 1459. As first practiced in Europe the sheets were printed on one side only, and the backs of the pages pasted together. The art of printing was intro duced into France in 1469; Italy, 1465; Spain, 1477, and England (by Caxton) in 1474. In letterpre printing the impre ions are taken directly the surface of the types, or from stereotyped plates [STEREOTYPE] by superficial pre ure, as in the hand printing-pre , or by cylindrical pre ure, as in the steam printing-machine, or by the action of a roller, as in the copper-plate pre . The ink or pigment employed is laid upon the surface of the type with a printer's roller. Printing is divided into two departments, composition and pre -work. (See these words.) In printing for the blind the letters or characters are impre ed in relief on stout paper or cardboard without the use of ink. 2. Photog.: The proce of obtaining proofs from negatives. [AUTOTYPE, PHOTOCOLLO-TYPE, PLAΓΙΝΟΤΥΡΕ, POWDER-PROCESS, SILVER-PRINTING, STANNOTYPE, WOODBURYTYPE.]