Glue For Cementing Paper And Leather
Take Isinglass and Parchment
each one ounce, Sugar Candy and Gum Tragacanth each two drachms, add to
them one ounce Water, and boil the whole together till the mixture
appears (when cold) of the consistency of Glue; then pour it into any
form you please. If this glue be wet with the tongue, and rubbed on the
edge of paper, silk or leather that are to be cemented, they will, on
being laid together, pressed tightly and suffered to dry, be as firmly
united as other parts of the substance. It is fine to seal letters.