GEORGE CAMPBELL, D. D. F. R. S. EDIN.

PRINCIPAL OF THE MARISCHAL COLLEGE, ABERDEEN.

Certo sciant homines, artes inveniendi solidas et veras adolescere et incrementa
sumere cum ipsis inventis,

Bac. De dugm. Scient. l. v. c. S.

A NEW EDITION.

Edinburgh:

PRINTED BY THOMAS TURNBULL,

OLD ASSEMBLY CLOSE.

1819.