Certain delicate works require only a slight concentration in the solution of glue. For example, if it be required to fix crayons, by Loriot's process, six or eight deniers, or from 150 to 200 grains of fish glue, rendered soluble in 16 ounces of pure water, which is still diluted with two parts of alcohol at the time of its application, will be sufficient to give the proper degree of strength to such works, and to prevent the powder from being detached. The evaporation is very much favoured by the alcohol (spirit of wine). ,,Fish glue holds the first rank among the substances of this kind on account of its being colourless.