He desired us first of all to observe the
Pericardium
, or outward Case of the Heart, which we did very attentively; and by the help of our Glasses discern'd in it Millions of little Scars, which seem'd to have been occasioned by the Points of innumerable Darts and Arrows, that from time to time had glanced upon the outward Coat; though we could not discover the smallest Orifice, by which any of them had entered and pierced the inward Substance.
Every Smatterer in Anatomy knows that this
Pericardium
, or Case of the Heart, contains in it a thin reddish Liquor, supposed to be bred from the Vapours which exhale out of the Heart, and, being stopt here, are condensed into this watry Substance. Upon examining this Liquor, we found that it had in it all the Qualities of that Spirit which is made use of in the Thermometer, to shew the Change of Weather.
Nor must I here omit an Experiment one of the Company assured us he himself had made with this Liquor, which he found in great Quantity about the Heart of a Coquet whom he had formerly dissected. He affirmed to us, that he had actually inclosed it in a small Tube made after the manner of a Weather Glass; but that instead of acquainting him with the Variations of the Atmosphere, it shewed him the Qualities of those Persons who entered the Room where it stood. He affirmed also, that it rose at the Approach of a Plume of Feathers, an embroidered Coat, or a Pair of fringed Gloves; and that it fell as soon as an ill-shaped Perriwig, a clumsy Pair of Shoes, or an unfashionable Coat came into his House: Nay, he proceeded so far as to assure us, that upon his Laughing aloud when he stood by it, the Liquor mounted very sensibly, and immediately sunk again upon his looking serious. In short, he told us, that he knew very well by this Invention whenever he had a Man of Sense or a Coxcomb in his Room.
Having cleared away the
Pericardium
, or the Case and Liquor above-mentioned, we came to the Heart itself. The outward Surface of it was extremely slippery, and the