Isinglass
The remarks of Liebig upon gelatine apply equally to isinglass, which must henceforth be regarded rather as a vehicle of ornament than as an article of nourishment. At least there is this in its favour-it is more delicate than gelatine. It is the best simple means at our command for giving firmness to liquids. It is made from the sound or swim-bladder of various fishes, but chiefly the sturgeon, which yields the best; and the mode of drying it has given rise to a number of confusing names-as purse, pipe and lump isinglass, leaf, honeycomb, staple and book isinglass. All depends on whether the sound is opened or unopened before being dried, and whether, being opened, it is folded again, left unfolded, or rolled out.