List of Prizes. 199 



lum Time-Keepers, moved by Weights or Springs ; or in Elec- 

 tro-Magnetic Time-Keepers, — in Screw-cutting, — in Printing- 

 Presses, — in Stereotyping, and in cleaning the plaster from the 

 Types, — in Furnaces and other Apparatus used in Stereotyping, 

 — in Type-Founding, — in the Composition of Printers' Rollers, 

 — in Ship-Building, with regard to Ventilation, both for the 

 Crew and the Timbers, — in Currying and Tawing of Leather, — 

 in Preparing Black Polished Leather equal to the French, — in 

 Stationary and Locomotive Engines, — in Railway Wheels and 

 Axles, — in Railway Telegraphs and Signals, — in Smith- Work 

 and Carpentry, — in Tools, Implements, and Apparatus for the 

 various trades, — in Electric, Voltaic, and Magnetic Apparatus. 



2. Chemical Arts. 

 Improvements in Fine Glass for Optical Purposes, free from Veins, 

 and of a Dense and Transparent quality, equal or superior to the 

 best Continental Glass, — also in rendering Glass hard and diffi- 

 cult of fusion for Chemical Purposes, — in the Annealing of Glass, 

 — in the Manufacture of Writing Inks, both Common and Copy- 

 ing, so as to flow freely from Metallic Pens, — in the Dissolving 

 of Caoutchouc, and applying it to useful purposes. 



3. Felative to the Fine Arts. 

 Improvements in Patterns of Porcelain, Common Clay, or Metal, 

 of Domestic Articles of simple and beautiful Forms, without 

 much Ornament, and of one Colour, — in the Preparation of 

 Lime and Plaster for Fresco Painting, and in appropriate tools 

 for laying the Plaster with precision, — in Engraving on Stone, — 

 in Daguerreotype, Talbotype, or other photographic processes, — 

 in applying such processes to stone, for Lithographic Printing, — 

 in Electrotype processes, — in the production of White or Neutral 

 Artificial Light by means adapted to ordinary use, — in Die- 

 sinking, — in Wood-cutting, and other methods of illustrating 

 Books to be printed with the Letter -Press, — in Printing from 

 Wood -cuts, &c., — in Ornamental Metallic Casting. 



II. Experiments applicable to the Useful Arts. 



III. Notices of Processes in the Useful Arts practised in this 

 Country, but not generally known. 



IV. Inventions, Processes, or Practices from Foreign Countries, 

 not generally known or adopted in this country, — such as the 

 Manufacture of Glass Pipes for Conveying Water, Gas, &c. 



V. Practical Details of Public or other Undertakings of Na- 

 tional importance, not previously published. 



VI. Discovery of Substitutes for Hemp and Flax, &c. 



