A

TREATISE,

SHEWING

THE NATURE AND BENEFIT OF THAT IMPORTANT SCIENCE,

AND

THE WAY TO ATTAIN IT.

Intermixed with

VARIOUS REFLECTIONS AND OBSERVATIONS ON HUMAN NATURE.

BY JOHN MASON, A. M.

The proper knowledge of mankind is Man. POPE.

Charlestown, (Mass.)

PRINTED BY SAMUEL T. ARMSTRONG,

1809.