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A WORK ORIGINALLY

UNDERTAKEN IN THE YEAR 1794, AND STILL CARRIED ON
WITH A VIEW TO COLLECT, RECORD, AND BRING INTO PUBLIC NOTICE,
THE USEFUL INVENTIONS OF ALL NATIONS.

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Printed by J. S. Hodson, Cross Street, Hatton Garden, London.

LIST OF PLATES

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VOL. XII., NEW SERIES.

PLATE I. Davy's Patent for Improvements in Apparatus for Making Signals by Electric Currents. 4to.

PLATE II. Thompson's Patent for additions to Locks for Doors, &c. Huxley, Huxley, jun., and Oliver's Patent for Improvements in Stoves.-Richardson's Patent for Improvements in the Method of Covering Buildings. 8vo.

PLATE III. Meyer's Patent for Improvements in the Manufacture of Lamps.-Ree's Patent for Improvements in Machinery for Raising Water for Propelling Boats, &c. 8vo.

PLATE IV. Fairbairn's Patent for Improvements in Looms for Weaving Ribbons, &c.-Knill's Patent for Improvements in Cleansing the Bottoms of Docks, Rivers, &c. 8vo.

PLATE V. Bunnett's Patent for Improvements in Steam-Engines.Beart's Patent for Improvements in Apparatus for Filtering Liquids. 8vo.

PLATE VI. Chance's Patent for Improvements in the Manufacture of Glass.-Suarce and Pontifex's Patent for a Mode of Obtaining Dyes, &c. from Vegetable Substances. 8vo.

PLATE VII. Hartley's Patent for Improvements in the Manufacture of Glass.-Howarth's Patent for Improvements in Machinery for Spinning, Roving, Doubling, and Twisting Cotton, &c. 8vo. PLATE VIII. Gamble's Patent for Improvements in Apparatus for the Manufacture of Sulphate of Soda.-Dowling's Patent for Improvements in Preparing Metals for the Prevention of Oxidation. 8vo.

PLATE IX. Poole's Patent for Improvements in Tanning.-Lund's Patent for Improvements in Extracting Corks from Wine and

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