Show A secret it Is often very desirable to know how to seal a letter so that it cannot be opened without betraying the fact steam or hot water will open erne lopes closed ath mucilage and even a wafer A hot iron or a spirit lamp dissolves sealing wai an impression in plaster been taken of the seal bf the combined use of water and sealing wax however all attempts to open the letter otherwise than by 1 force can be frustrated all that Is necessary Is to close the letter first with a small moist wafer and to pierce the latter with a coarse needle the same applies to mucilage whereupon sealing wax may be used in the usual manner this seal can neither be opened by dry heat nor by moisture |