OCTOBER 6th, 1838-MARCH 30th, 1839.

VOL. XXX.

"Our needful knowledge, like our needful food,

Unhedged, lies open in life's common field,
And bids all welcome to the vital feast."

YOUNG.

LONDON:

PUBLISHED FOR THE PROPRIETOR BY W. A. ROBERTSON,
MECHANICS' MAGAZINE OFFICE, PETERBOROUGH-COURT.

1839.

PRINTED BY W. A. ROBERTSON, 6, PETERBOROUGH-COURT, FLEET STREET.

COCKS'S MACHINE FOR MAKING LONG AND CIRCULAR BLOCKS OF INDIA RUBBER.

Fig. 5.

Fig. 3.

Fig. 1.

VOL. XXX.

MUSEU

No. 791.]

Mechanics' Magazine,

REGISTER, JOURNAL, AND GAZETTE.

Fig. 4.

Fig. 2.

PRINTED BY W. A. ROBERTSON, 6, PETERBOROUGH-COURT, FLEET STREET.

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