y 8 Kc-zii Publications. 



from the preceding ftatement that this is a miftake ? Be- 

 fore the heat paffed out of its then combination it made a 

 part ot the volume which we contemplated with our eyes, 

 and the proportion that this part bore to the whole might, 

 in many cafes, be determined by actual meafurement. Is 

 fenlible heat, or rather heat in fueh combinations as it is in 

 when that term is uk<\, cognifable by any other means ? 



To me it would appear as correct, when, by any power, 

 the capacity of a veffel filled with a liquid (water) is dimi- 

 nifhed, to fay that the portion of liquid thereby ejected is 

 fet at liberty ; meaning thereby that it has undergone an 

 effential change as to its form, properties, or mode of ex- 

 iflence ; as to fay, when the volume of a fubftance contain- 

 ing heat is abridged, and a proportionate quantity of the 

 heat is diflodged, that the heat, fo diflodged, has undergone 

 any fuch change. 



The fact in my opinion is, the fubftance in which the 

 caloric refided has undergone the change, where there is a 

 change ; not the heat : or, if it be changed, the change is 

 of that kind which paries upon a brick or any other body 

 when we move it from one room to another. This, I think, 

 mult be pretty clear from what we have already ftated ; but 

 I hope to make it ftill more fo by examining a particular 

 cafe or two which have been made to ferve for a foundation, 

 as it were, for the doctrine which I oppofe. 



[To be continued.] 



NEW PUBLICATIONS. 



An Account of the Irides or Corona which appear around } and 

 contiguous to, the Bodies of the Sun, Moon, and other Lu- 

 minous Objects. Cadell and Davies, 1799. 46 pages. 

 With One Copperplate. 



T 



HIS treatife is by the author of the Obfervations on the 

 Inflexions of light, of which a fhort account was given in 

 the Philosophical Magazine for September. In making 

 thefe obfervations, that ingenious gentleman perceived that 



a ray 



