STANFORD
LIBRARIES

ON LETTERS PATENT

FOR INVENTIONS.

BY

FREDERICK EDWARDS, JUN.

AUTHOR OF

66 OUR DOMESTIC FIRE-PLACES,"

AND

"A TREATISE ON SMOKY CHIMNEYS."

LONDON:

ROBERT HARDWICKE, 192, PICCADILLY.

1865.

[The right of translation or reproduction is reserved.]

KD1369

E3

LONDON:

PRINTED BY J. DAVY AND SONS, 137, LONG ACRE.