12 FORMATION OF SHELLS OF ANIMALS, ETC., 
them, namely, the existence of a physical process of 
coalescence of hard, solid, globular bodies, by means of 
their mutual attraction, it may be observed, that the pre- 
sence of these globular and oval particles, as there noticed, 
can only be accounted for in one or other of two ways: 
either these must have been the forms and dimensions 
which they first assumed at the instant of their coming 
into existence as solid bodies, or these forms and dimen- 
sions must have resulted from the aggregation of pre- 
existing smaller particles. Now, as im the earliest stage 
Fig. 4. 
Ly, Wy / 
\ ‘Aw se iby) i, ie Y 
of this experiment none of the larger globular and oval 
particles are visible, whilst the minutest ones abound, 
producing the nebulosity before mentioned—it being only 
at a subsequent period, and after much of the nebulosity 
has vanished, that the larger globules make their appear- 
ance—it is certain, as far as ocular proof can make it, 
that the larger globular and oval particles are not the first 
or elementary forms of the carbonate of lime occurring in 
this experiment; and hence it must follow that the second 
