Jewelers' Cement
Put in a bottle 2 ounces of isinglass and 1 ounce of the best gum Arabic, cover them with proof spirits, cork loosely and place the bottle in a vessel of water, and boil it until a thorough solution is effected; then strain for use.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
Put in a bottle 2 ounces of isinglass and 1 ounce of the best gum Arabic, cover them with proof spirits, cork loosely and place the bottle in a vessel of water, and boil it until a thorough solution is effected; then strain for use.