metres. The highest Pyramid in Egypt- - - - - - - - - - - -146 The Cathedral at Anvers - - - - - - - - - - - - - 144 The Cathedral at Strasburg - - - - - - - - - - - - 142 The Steeple of St. Stephen, at Vienna, (Austria) - 138 The Steeple of St. Martin, at Landshut - - - - - - 137 St. Peter's, at Rome - - - - - - - - - - - - - - -132 The Steeple of St. Michael, at Hamboro' - - - - - 130.5 The Steeple of St. Peter, at Hamboro' - - - - - - 119 St. Paul's Cathedral, at London - - - - - - - - - 109.7 The Cathedral of Ulm - - - - - - - - - - - - - - -109.4 The Cathedral of Milan - - - - - - - - - - - - - 109 The Tower of the Asinelli, at Bologna - - - - - - 107 The Dome of the Invalids, at Paris - - - - - - - - 105 The Cathedral of Magdebourg - - - - - - - - - - - -101.6 The Cupola of the Pantheon, at Paris - - - - - - - 79 The Balustrade of Notre Dame, at Paris - - - - - - 66 The metre is 39.37 inches.--_From the French_. _Prevention of Fire in Theatres_. In consequence of the frequent occurrence of fires in theatres, particular precautions have been taken with the theatre of the Port St. Martin, at Paris. A thick wall of hewn stone separates the audience part from the scenic part of the house; all the doors in it are of iron, and may be shut instantly, in case of fire; finally, the insulation of the spectators from the stage is made perfect by means of a screen of plates of iron, which falls down before the stage. This screen, which weighs between 1,200 and 1,300 pounds, is easily worked by two men, and slides up and down upon guides, so as readily to take its place. Besides these precautions, reservoirs of water are established in the roof, which may be connected, when necessary, with vessels of compressed air, and made to throw a powerful jet over a very large part of the building.--_French Paper_. _Tanning_.