having
then, himself, first traced both its top, and bottom, upon paper; and
having measured its thickness in every part, with a pair of compasses;
caused a very exact mould to be formed: and afterwards, in that mould,
had this model cast in glass: wherein, also, the appearances of the
imbedded, common, small, roundish hail-stones, are seen transparently;
just as they appeared in the great hail-stone itself originally.

Fig. 1, is a representation of the flat bottom of the stone.

Fig. 2, is a representation of the top of the stone.

And fig. 3, shews the whole solid appearance sideways.

Whilst Mr. Rashleigh was taking the measures, it melted so fast, that he
could not, in the end, take the _exact weight_, as he fully intended to
have done. But as this model in glass weighs exactly 1 ounce, 16
pennyweights, 23 grains, we may fairly conclude, that the hail-stone
itself weighed much above half an ounce.

For it is well known, that the specific gravity of common glass, of
which sort this model is made, is to that of water, as 2.620 to 1.000.
And the specific gravity of common water, is to ice, as 8 to 7.[CC]--And
computing according to this standard, I make the exact weight of the
hail-stone to have been 295 grains.

From the singular manner in which the small, prior, common hail-stones
appear to have been imbedded in this larger one, whilst they were
falling to the earth; there is reason to be convinced, that it was
formed in the atmosphere, by a sudden extraordinary congelation _almost
instantaneously_, out of rain suddenly condensed, which was mingled with
the common hail.

And it was very remarkable, that its dissolution, and melting, also, was
much more rapid than that of the common small white hail-stones: as was
the case, in like manner, with the other numerous large ones.

Perhaps it ought to be here added:--that on the 18th of May, in the year
1680, some hail-stones are recorded to have fallen in London, near
_Gresham college_, which were seen and examined by the celebrated _Dr.
Hooke_; and were some of them not less than two inches over, and others
three inches.

This which fell in Cornwall was only about one inch and three quarters
long; an inch, or in some parts an inch and a quarter broad; and between
half an inch, and three quarters of an inch thick. And its weight was
near an ounce.--How much more tremendous then were those others, that
have been described as having fallen in France?--the account