The American Printer: A Manual of Typography / Containing practical directions for managing all departments of a printing office, as well as complete instructions for apprentices; with several useful tables, numerous schemes for imposing forms in every variety, hints to authors, etc.

by Thomas MacKellar

Ornith.—Ornithology.

O. S.—Old Style, (before 1752.)

O. U. A.—Order of United Americans.

Oxf.—Oxford.

Oxon.—Oxonia, Oxonii, Oxford.

oz.—Ounce.

P.—Particula, a little part, as much as can be taken between the ends of two fingers; pondere, by weight.

P. or p.—Page; Part; Participle.

Pa. or Penna.—Pennsylvania.

Pal.—Palæontology.