(1) An attempt has been made to prepare glue from the skins and refuse of fish, in the same way that ordinary glue is prepared from the skins and offal of land animals. Such glue has been made in large quantity, and forms a very good size for some purposes. Thus far, however, it has been found impossible to free it from a very disagreeable fish-like odour, and another objection is, that it does not gelatinize. It is probable that by exercising greater care and by using the skins alone, freeing them from scales and oil, a very strong and serviceable glue might be prepared. The ordinary method at present in use for curing fish, will, probably, at no distant day, give place to others by which the product will be more condensed and more palatable. In that case, it is probable that fish skins will be an important part of the refuse, and a method of obtaining good glue from them will be a most valuable process. That there is no inherent difficulty with mere fish product is shown by the manufacture of isinglass, which is one of the strongest glues. The northern seas will probably be the chief seats of this new industry, as the skins can there be subjected to the processes required, without.,such danger from putrefaction as exists in warm climates.

See Lapland Glue.

(2) A correspondent of a technological paper describes a method of preparing glue from fish scales. He says: "The natives of the Maldive and Laca-dive Islands, and the Malays of the coasts of Borneo and Sumatra, have a glue which they make as follows: - They take the scales of a kind of fish, called by English and American sailors salt-water trout (identical with the salt-water trout of the Gulf of Mexico), and after thoroughly washing them in a glazed earthen jar, which they stopper tightly, and weight so that it will remain under water, they put this jar in a pot of water, and boil it until the scales are reduced to a semi-transparent viscous mass. This requires several hours. Care should be taken that no water or extraneous matter, fluid or solid, be allowed to get into the jar with the scales. The glue thus made is the most tenacious, and at the same time the most transparent and beautiful that I have ever seen. I have made it in this country from the scales of perch, trout, and bass. I am informed that a similar glue is made from the bladders of various fishes."