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Perkins's Impiovements i7i the 



wanning rooms, heating baths, laundries, &c., may, at no distant time, be 

 circulated bv companies, in the same manner as gas ; and, in London, 

 instead of one fire tor every room, as at present, there may be only one in 

 a parish, or in every square of an acre in area. For tlie present, however, 

 we shall not indulge in further speculations as to the uses to which this 

 invention may be ap[)lied, but conclude by giving a description of Mr. Per- 

 kins's apparatus; and this we shall do, partly by copying, in his own 

 words, a part of iiis specification, as given in the licpertori/ fur Patent 

 Jnventivns for March, 1832, and by engravings made from drawings fur- 

 nished us by himself. 



" A {fig. 'i-i.) is a vertical section of the description of furnace I prefer, 

 and B is a plan or horizontal section: in each of these figures the same letters 



of reference indicate similar parts, and such is the case in the other figures 

 in the drawings. The description of tubes wiiicli I have used, and find to 

 answer, are what arc called drawn gas tubing; and the size I most com- 

 monly employ is about 1 in. outside diameter, and the diameter of the 

 inner area is about five eighths of an inch ; but I do not confine myself to 

 the use of this size tubing. 



