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

Prin.—Principally.

Prob.—Problem.

Prof.—Professor.

Pron.—Pronoun; Pronunciation.

Prop.—Proposition.

Prot.—Protestant.

Pro tem.—Pro tempore, for the time being.

Prov.—Proverbs; Provost.

prox.—Proximo, next (month.)

P. R. S.—President of the Royal Society.