OCR Text |
Show A 8ecret. It Is often very dcsirablo to know how to Bcal n letter so that It cannot bo opened without bctrnylng tho fact. Steam or hot water will open envelopes enve-lopes closed with mucllago nnd oven a wnfor. A hot Iron or n spirit lamp dissolves scaling wax, an Impression in plaster having been taken of tho teal. I)y tho combined uso of water and scaling wax, however, all attempts to open tho letter othcrwiso than by forco can bo frustrated. All that Is necessary Is to closo tho letter first with a small moist wafer and to plcrco tho latlor with a coarse needle (tho samo applies to mucllago), whereupon sealing wax may bo nnod In the usual manner. Tills seal can neither bo opened by dry heat nor by molsturo. |