whereby the watery steams volatile in the Air are discerned, which the Nose it self is not able to find.  This I have describ’d in the following Tract in the Description of the Beard of a wild Oat.  Others there, are, may be discovered both by the Nose, and by other wayes also.  Thus the smoak of burning Wood is smelt, seen, and sufficiently felt by the eyes:  The fumes of burning Brimstone are smelt and discovered also by the destroying the Colours of Bodies, as by the whitening of a red Rose:  And who knows, but that the Industry of man, following this method, may find out wayes of improving this sense to as great a degree of perfection at it is in any Animal, and perhaps yet higher.

’Tis not improbable also, but that our taste may be very much improv’d either by preparing our taste for the Body, as, after eating bitter things, Wine, or other Vinous liquors, are more sensibly tasted; or else by preparing Bodies for our tast; as the dissolving of Metals with acid Liquors, make them tastable, which were before altogether insipid; thus Lead becomes sweeter then Sugar, and Silver more bitter then Gall, Copper and Iron of most loathsome tasts.  And indeed the business of this sense being to discover the presence of dissolved Bodies in Liquors put on the Tongue, or in general to discover that a fluid body has some solid body dissolv’d in it, and what they are; whatever contrivance makes this discovery improves this sense.  In this kind the mixtures of Chymical Liquors afford many Instances; as the sweet Vinegar that is impregnated with Lead may be discovered to be so by the affusion of a little of an Alcalizate solution:  The bitter liquor of Aqua fortis and Silver may be discover’d to be charg’d with that Metal, by laying in it some plates of Copper:  ’Tis not improbable also, but there may be multitudes of other wayes of discovering the parts dissolv’d, or dissoluble in liquors; and what is this discovery but a kind of secundary tasting.

’Tis not improbable also, but that the sense of feeling may be highly improv’d, for that being a sense that judges of the more gross and robust motions of the Particles of Bodies, seems capable of being improv’d and assisted very many wayes.  Thus for the distinguishing of Heat and Cold, the Weather-glass and Thermometer, which I have describ’d in this following Treatise, do exceedingly perfect it; by each of which the least variations of heat or cold, which the most Acute sense is not able to distinguish, are manifested.  This is oftentimes further promoted also by the help of Burning-glasses, and the like, which collect and unite the radiating heat.  Thus the roughness and smoothness of a Body is made much more sensible by the help of