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THE

MECHANICS' MAGAZINE

AND

JOURNAL OF ENGINEERING, AGRICULTURAL MACHINERY,

MANUFACTURES, AND SHIPBUILDING.

Varela

VOLUME X X.---NEW SERIES

(WITH OLD SERIES, VOLUME LXXXIX.)

JULY TO DECEMBER, 1868.

LONDON:

ROBERTSON, BROOMAN, AND CO., “ MECHANICS' MAGAZINE” AND PATENT OFFICES,

166, FLEET STREET, E.C.

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