52 ANNUAL OF SCIENTIFIC DISCOVERY. 



cent gas, in its transit through these apertures, is robbed of its heat, 

 the flame is extinguished, and the heat is developed in the wire-gauze, 

 which becomes red-hot. In the present invention cylinders of various 

 sizes are made of a mixture of one third of china-clay with two thirds 

 of common pipe-clay ; they are perforated with numerous orifices, and 

 have a circular opening at one end to screw on to a No. 4 gas-burner. 

 This cylinder, or hood, is the converse of the Davy-lamp, the gas 

 being inside instead of outside, and on its escaping through the holes 

 and fire being applied, the hood in one minute becomes red-hot. A 

 battery of these hoods placed in a circle, and covered with a case, is 

 heated to an orange color, and a temperature has been obtained suf- 

 ficient to melt the more refractory metals. For warming apartments, 

 a battery of twelve hoods is inclosed in an earthenware case, which, 

 becoming heated to 500 F., forms a repository of heat. This, in 

 turn, is placed in an outer ornamental case. The products of com- 

 bustion are carried off by a pipe into the chimney, while fresh air is 

 supplied from outside the dwelling through a tube communicating 

 with the space between the two cases, where it ascends, is warmed, 

 and passes into the room through large holes in the top of the stove. 

 The expense of such a fire is sixpence per day. It may be used for 

 cooking, for refining gold and silver, for steam-engines, and various 

 other purposes. London Mining Journal, Sept. 21. 



SOYER'S MAGIC STOVE. 



AFTER various experiments, M. Soyer has succeeded in bringing to 

 perfection his magic stove. The magic stove was exhibited to the 

 public on Saturday and Monday last, and a more efficient, portable, 

 clean, and ornamental cooking apparatus it is impossible to imagine. 

 The whole apparatus can be placed in a hat, and the cooking is con- 

 ducted on the dinner table, without smell, without smoke, and without 

 even soiling the cloth. The apparatus itself is rather ornamental than 

 otherwise. It consists of a round copper, in shape and size somewhat 

 resembling a counting-house inkstand, with a furnace-opening, and a 

 flue passing from this opening, near the bottom of one of its sides, 

 through the middle and up the centre to the top ; on this top is placed 

 a frying-pan, stew-pan, sauce-pan, kettle, or coffee-pot. Adjoining 

 the stove or copper is a vessel with two reservoirs for spirits of wine, 

 or any other kind of spirit, one at the bottom, the other at the top. 

 To the bottom reservoir are affixed two burners with their wicks ; one 

 of them is placed opposite the opening of the flue in the stove, the 

 other is under the other reservoir. In connection with the upper res- 

 ervoir is a tube, or blow-pipe, passing from the centre of its apex, 

 down by its side, under it, and opening in the wick that burns at the 

 mouth of the flue. The spirit in the upper reservoir being heated by 

 ths burner beneath it, a gaseous vapor is generated, which, rushing 

 out of the blow-pipe, and coming in contact witli the burner at the 

 mouth of the flue, is ignited and passes in a volume of flame through 

 the flue, and fries, stews, or boils whatsoever is placed over it. It 

 will cook Islbs. of rump steak in five minutes. A little explanatory 



