160 ANNUAL OP SCIENTIFIC DISCOVERY. 



Pigments. For an account of the various pigments used in the 

 Fine Arts, with suggestions for the introduction of new and improved 

 substances. 



Substitute for Wood Blocks. For the discovery of a substitute for 

 the blocks used by wood-engravers, so as to supersede the necessity of 

 uniting several pieces of wood. 



Photographs on Enamel. For the best portrait obtained photo- 

 graphically and burnt in in enamel. 



Photographs on China. - - For the production of a dessert or other 

 service, in china or earthenware, ornamented by means of photog- 

 raphy, and burnt in from an impression obtained either directly from 

 the negative, or from a transfer from a metal plate obtained directly 

 from the photograph. 



Photographs on Windows. For the production commercially of or- 

 namental glass for windows by means of vitrified photographs. 



Fluoric Acid. - - For a substitute for fluoric acid, to be used for en- 

 graving on glass, which shall be free from noxious fumes. 



Reproducing Designs for Printing. For a rapid means of repro- 

 ducing artistic designs or sketches, ibr surface-printing by machinery, 

 such process to provide for lowering portions of the work to fit it for 

 steam-printing. 



Hollers for Calico-Printing. For any important improvements for 

 facilitating the production and economizing the cost of engraving roll- 

 ers for printing calicoes and other fabrics. 



Aniline Colors. For a means of fixing upon cotton and other fab- 

 rics all the ordinary aniline colors, so that the dyed fabric will effec- 

 tually resist the action of soap and water, or cold dilute alkalies. 



Napthaline. For a process for converting the napthaline of gas- 

 works into alizarine or madder-red. 



Chlorophyll. For the manufacture of chlorophyll from grasses, 

 suitable for dyeing silk and other fabrics of a green color. 



Green Dyes. For the manufacture of green dyes from coal, or 

 wood-tar. 



Paints for Carriages. For the production of cheap purple and 

 yellow lakes of good quality, suitable for carriage-builders, etc., and 

 not liable to fade or change color. 



^j 



New Scarlet Dye. For the production of a scarlet dye for cotton. 



Bleaching Wool. For an account of any important improvements 

 in the bleaching of wool. 



Tltickening Colors. - - For the introduction of any substance, the use 

 of which will essentially economize the cost of thickening the colors and 

 sizes used in dyeing and dressing fabrics. 



Substitute for Egg-Albumen. For a thoroughly decolorized blood- 

 albumen, or any economic and efficient substitute for egg-albumen in 

 calico-printing. 



Uses of Seaweed. For the extraction from seaweed of any sub- 

 stance or preparation capable of extensive application as a dye, drug, 

 thickening, tanning agent, or any other generally useful product. 

 Also, for a means of rendering seaweeds generally available as a whole- 

 some vegetable food on board ship. 



Mining Machinery. - - For improvements in the machinery for dress- 

 ing poor ores of tin, lead, etc. 



