426 On the Chemical Phenomena of Heat. (June, 
pidly than the intensity of the attraction, as we recede from the 
centre of any particle. ‘That this law really attains admits of easy 
demonstration. 
Suppose C (Plate LXVII., Fig. 1.) the centre of a minute par- 
ticle of matter, C » a radius produced; at N draw PN | CN, 
and suppose P N to represent the centripetal force at the surface ; 
describe P P’ Q, a curve such that every ordinate P’ 2 shall measure 
the centripetal force at the distance Cz; let C.2 = 2 and PN 
= y; in this curve y a ~ (n being most probably = 2); draw 
1 
any other curve, p P’ L, such that ya—>=5, m<n; letpN< 
PN, the curves will intersect each other in some point P’; at 7 .*. 
the forces are =, and consequently another = and similar corpus- 
cule placed with its centre at 7 will be in = librio; let (Fig. 2) be 
increased (increasing the ordinates of the curve p P’ L representing 
an augmentation of the calorific repulsion arising from increase of 
temperature) P’ will approach nearer P, or contraction arise from 
elevation of temperature, which is absurd; when .*. p N is very 
small, 2, the point of = librio will be far removed from N, and 
as the heat is increased, it will approach to C, or a mass composed 
of such particles gradually contract, till p N = PN, after which 
the most minute movement of heat must separate the corpuscles ad 
injfin., as the curves never can in that case intersect each other, 
which is altogether contrary to the observed order of things. Nearly 
similar is the result of ¥ If, however, the centrifugal force 
1 Pgs 
a increments of heat produce continual separation be- 
getm 
tween two, and consequently expansion of an aggregate of a great 
number of particles, which accords with every fact. We are totally 
unacquainted with the manner in which caloric is attracted by these 
particles. However, I am inclined to believe that the centripetal 
force exerted by any corpuscle upon caloric « 
Quantity of matter in the corpuscle 
distance) * 
is drawn will be considered in a future paper. I shall now proceed, 
in general terms, to find measures for the temperature, capacities 
for heat, &c. 
Let C represent the centre of a corpuscle, C N 7 a radius pro- 
duced. Draw rs _| N 7 to represent the density of caloric, or 
temperature of the ambient medium. Draw so //Cr and P pé, 
the curve representing the density of the calorific atmosphere cor- 
responding to the temperature rs. Draw another curve P’ N C p’ P” 
such that its ordinates P’ N, &c. = P N x dist.* from C. The area 
of this curve will represent the quantity of caloric surrounding the 
atom ; 7s is that part which alone affects the thermometer; the 
: the facts from which this inference 
