294 



Perkins's Improvements in the 



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

 circulated by companies, in the same manner as gasj and, in London, 

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

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

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

 invention may be applied, 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 his specification, as given in the Repertory for Patent 

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

 nished us by himself. 



" A (f'g- 4-4 1 .) 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 which I have used, and find to 

 answer, are what are 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. 



