MECHANICS' MAGAZINE,

MUSEUM,

Register, Journal,

AND

GAZETTE,

JULY 7TH- DECEMBER 29TH, 1849.

EDITED BY J. C. ROBERTSON.

VOL. LI.

"Give good hearing to those that give the first information in business."-BACON.

London:

ROBERTSON AND CO.,

MECHANICS' MAGAZINE OFFICES,

No. 166, FLEET-STREET, LONDON; AND No. 99B, NEW-STREET, BIRMINGHAM.
AGENTS:-FOR MANCHESTER, MESSRS. WISE AND WOOD,
3, COOPER-STREET;

EDINBURGH, J. SUTHERLAND;

GLASGOW, W. R. M'PHUN AND DAVID ROBERTSON;
DUBLIN, MACHIN AND CO., 8, D'OLIER STREET;
PARIS, A. & W. GALIGNANI, RUE VIVIENNE;
HAMBURGH, W. CAMPBELL.

1849.