262 Improvements in heating hi) hot Water. 



Concluding that my sketches are understood, I will detail 

 their application. The apparatus being filled with water, you 

 close the valve, and the lox'cer pipes gradually become heated 

 (thus far is the old apparatus) ; but should you require more 

 heat, by turning quite round the valve, or only half turning 

 it, as may be required, the hot water at the top of the boiler 

 instantly forces the cold water out of the upper pipes, and you 

 have a second range of hot pipes, and by the use of the valve 

 you may regulate this heat at will. I would also have above 

 the second range of pipes, a sufficient space to allow of a third 

 range, should it be found requisite ; and this can be done by 

 having shoulders made in the boiler, as represented by dot- 

 ted lines (// ^), and these orifices closed with plates of tin or 

 copper, which (should a third range be required) could easily 

 be unsoldered, and the pipes adjusted without altering any 

 portion of the original apparatus. Through the summer, the 

 second range, probably, would not be required, and by having 

 a cock in any part of the apparatus, the water may be entirely 

 drawn off, so as to leave them empty, the boiler then having 

 only the lower or original range to heat. 



These hints (which I cannot but flatter myself are valuable), 

 perhaps, best apply to such apparatus as have failed in pro- 

 ducing, through this severe winter, the requisite temperature ; 

 but should we know what quantity of pipe (or properly water) 

 will heat a house, the single range can be used ; and then, for 

 the purpose of regulating the heat, I would recommend the 

 valve and boiler d, which, closing the pipes in part or alto- 

 gether, must produce whatever temperature you require. I 

 am speaking of an apparatus possessing the power alluded to 

 in the foi'mer part of this communication. 



Before the above occurred to me, I had a valve made (5), 

 which I fitted into a glass 1 -inch tube, and adjusted it to fit one 

 of my lateral pipes (fig. 4. p. 20.); the glass tube was 3 ft. 

 long, and was introduced in the place of the metal pipe, for 

 the purpose of observing the motion of the water. This little 

 apparatus answered very well, although it was not entirely 

 cold, as it received heat at the end of the pipe h (fig. 4. p. 20.), 

 but when the valve was open, its effect was almost instantly per- 

 ceptible, not only by the motion of the water, but by the addi- 

 tional heat. 



I cannot allow this letter to go to you without detailing my 

 method of applying the hot water. Necessity is the mother of 

 invention ; and when I was about removing my plants, I could 

 not take down my hot water apparatus until my plants were 

 removed, and I could not remove the stove plants until I had 

 a proper receptacle for them. Accordingly, I built a jiit after 



