Preparing fish glue

You can buy fish glue in pearls. You soak them in doble amount of water over night. The next day you can heat the mixture up in a water bath until the pearls are dissolved totally. It smells bad but the pearls have nearly no expiry date and the glue can be reheated whenever you want to use it again. But you have to apply it rapidly as it toughens and gets hard quickly. One of the advantages of fish glue is that you can undo the glued connection by applying warm water or heating the glue up, e.g. with an iron. Fish glue is used on old furniture and also on marquetry. On the Old-Woodworking-Tools webpage you'll find a really nice copy of an old newspaper showing some gluepots.