_Secondly_, The Honourable _Robert Boyle_, in his _Usefulness of Experimental Philosophy_, _sect_ 2. _ch._ 15. considering the Body of a Living man or any Animal, as an Engine, so composed, that there is a conspiring communication betwixt its parts, by vertue whereof a very slight impression of adventitious matter upon some one part, may be able to work, on some other distant part, or perhaps on the whole Engine, a change far exceeding, what the same adventitious matter could do upon a Body not so contrived: Representing, I say, an Animal in this manner, and thence inferring, how it may be alter'd for the better or worse by motions or impulses, confessedly _Mechanicall_, observes, How some are recover'd from swouning fits by pricking; others grow faint and do vomit by the bare motion of a Coach; others fall into a troublesome sickness by the agitation of a Ship, and by the Sea-air (whence they recover by rest, and by going a shore.) Again, how in our Stables a Horse well-curried is half-fed: How some can tell by the Milk of their Asses, whether that day they have been well curried or not: Arguing hence, that if in _Milk_ the alteration is so considerable, it should be so likewise in the _Blood_, or other Juyces, of which the Blood is elaborated, and consequently in divers of the principal parts of the Body. Where also (upon the authority of _Piso_) he refers the Reader to the _Brasilian_ Empiricks, whose {208} wild _Frictions_, as unskilfully as they order them, do strange things, both in _preserving health_, and _curing diseases_; curing Cold and _Chronical_ ones by _Friction_, as they do _Acute_ ones, by _Unction_.