THE REPERTORY OF PATENT INVENTIONS, AND OTHER Discoveries and Emprovements IN ARTS, MANUFACTURES, AND AGRICULTURE; BEING A CONTINUATION, ON AN ENLARGED PLAN, OF THE Repertory of Arts and Manufactures : A WORK ORIGINALLY UNDERTAKEN IN THE YEAR 1794, AND STILL CARRIED ON WITH ENLARGED SERIES.-VOL. IV. LONDON: PUBLISHED FOR THE PROPRIETOR, BY ALEX. MACINTOSH, GREAT NEW STREET; PLATE I. Lund's Patent for Improvements in the Construction PLATE III. Bush's Patent for Improvements in rendering PLATE IV. Lamb's Patent for a Certain Improvement or Improvements in Machinery used for Preparing and Spinning Cotton, &c.-Boydell's Patent for Improvements in the Manufacture of Metallic Roofs, &c.-Ainslie's Patent for a New and Improved Mode of Making or Moulding Tiles, &c. PLATE V. Kibble's Patent for Improvements in Apparatus for Propelling Vessels.-Garrett's Patent for Improvements in Machinery for Drilling, &c. PLATE VI. Champion and Marsden's Patent for Improvements in Drawing, Winding, and Spinning Cotton, &c.Mylne's Patent for Improvements in the Construction of Watches. PLATE VII. Robinson's Patent for Certain Improvements in the Construction and Mode of Working Engines by the Agency of Air or Gases for Obtaining or Producing Motive Power.-Hale's Patent for Improvements in Rockets. Buret and David's Patent for Improvements in the Manufacture of Gas. PLATE VIII. Masterman's Patent for a Certain Method or Mechanism for the Speedy Cooling of Liquids, being within Certain Degrees of Temperature, and which Method or Mechanism is termed a Refrigerator.-Hinks, Wells, and Finnemore's Patent for Improvements in the Manufacture of Metallic Pens, and in Machines for Manufacturing Metallic Pens.-Shepherd's Patent for an Improved Fourport Slide Valve, and an Improved Controller for Reversing Steam-engines, and for Working the Steam expansively in the cylinder. PLATE IX. Wollaston's Patent for Improvements in Machinery for Cutting Marble and Stone.-Vaile's Patent for Improvements in Manufacturing Metal combined with other Matters for the Covering of Floors and other Surfaces. PLATE X. Newall's Patent for Certain Improvements in Wireropes, and in Machinery for Making such Ropes. PLATE XI. Ransome, May, Biddell, and Worby's Patent for |