§ 25. Amongst other things which he put in to try its strength, he once
flung in some Fish which had been thrown a-shore by the Water, and as
soon as e're he smelt the Steam, it rais'd his Appetite, so that he had
a Mind to Taste of them; which he did, and found 'em very agreeable and
from that time he began to use himself to the Eating of Flesh, and
applied himself to Fishing and Hunting till he understood those sports
very well: upon this account he admir'd his Fire more and more, because
it help'd him to several sorts of Provision which he was altogether
unacquainted with before.

§ 26. And now when his Affection towards it was increas'd to the highest
degree, both upon the account of its Beneficial Effects, and its
Extraordinary Power; he began to think that the Substance which was
departed from the Heart of his Mother the Roe, was, if not the very same
with it, yet at least of a Nature very much like it. He was confirm'd in
his Opinion, because he had observ'd in all Animals, that as long as
they liv'd, they were constantly warm without any Intermission, and as
constantly Cold after Death, Besides he found in himself, that there was
a greater degree of Heat by much in his Breast, near that place where he
had made the Incision in the _Roe_. This made him think that if he could
dissect any Animal alive, and look into that Ventricle which he had
found empty when he dissected his Dam the _Roe_, he might possibly find
it full of that Substance which inhabited it, and so inform himself
whether it were of the Substance with the Fire, and whether it had any
Light or Heat in it or not. In order to this he took a Wild Beast and
ty'd him down, so that he could not stir, and dissected him after the
same manner he had dissected the _Roe_, till he came to the Heart; and
Essaying the left Ventricle first, and opening it, he perceiv'd it was
full of an Airy Vapour, which look'd like a little Mist or white Cloud,