AN EDITORIAL INTRODUCTION, WITH, EXPLANATIONS OF PRAC-
TICE AND PROCEEDINGS USED IN PROCURING PATENTS
THROUGHOUT THE WORLD.

COMPILED AND EDITED BY

JOHN L. KINGSLEY, C. E.

AND

JOSEPH P. PIRSSON, C. E.

PATENT AGENTS,

Editors and Publishers of the " Eureka, or the National Journal of Inventions,
Patents, and Science."

Entered according to Act of Congress, in the year one thousand eight hun dred and forty-eight, by

JOHN L. KINGSLEY AND JOSEPH P. PIRSSON,

In the Clerk's office of the District Court of the Southern District of New York.

Stereotyped by John M'Nicoli 11 Spruce St., N.Y.