Whatever be the matter from which it is proposed to extract gelatin (glue), the process always employed is strong decoction in water...The preparation of it is very simple. The twisted pieces of the membranous matter which furnishes it is bruised by means of a mallet, and then torn to shreds, which are cut into small portions and boiled in a sufficient quantity of pure water. The decoction being strained through a clean cloth which retains the membranous part, it is evaporated over a slow fire until it be observed that some drops of the decoction thrown on paper and deposited in a cool place assume the consistence of a trembling jelly. The decoction is then left to cool. In this state it will keep five or six days in summer, and longer in winter.,,Sometimes brandy is employed for diluting this glue; but as the temperature to which it is exposed dissipates all the spiritous matter, it will be better to add brandy to fish glue already prepared and of a consistence somewhat strong., ,,