of the Birch-Water (which I have sometimes drunk upon Helmonts great and not undeserved commendation) Now the graft, being fasten’d to the stock must necessarily nourish its self, and produce its Fruit, only out of this compound Juice prepared for it by the Stock, being unable to come at any other aliment. And if we consider, how much of the Vegetable he feeds upon may (as we noted above) remain in an Animal; we may easily suppose, That the blood of that Animal who Feeds upon this, though it be a Well constituted Liquor, and have all the differing Corpuscles that make it up kept in order by one præsiding form, may be a strangely Decompounded Body, many of its parts being themselves decompounded. So little is it Necessary that even in the mixtures which nature her self makes in Animal and Vegetable Bodies, she should have pure Elements at hand to make her compositions of.
Having said thus much touching the constitution of Plants and Animals, I might perhaps be able to say as much touching that of Minerals, and even Metalls, if it were as easy for us to make experiment in Order to the production of these, as of those. But the growth or increment of Minerals being usually a work of excessively long time, and for the most part perform’d in the bowels of the Earth, where we cannot see it, I must instead of Experiments make use, on this occasion, of Observations.
That stones were not all made at once, but that are some of them now adayes generated, may (though it be deny’d by some) be fully prov’d by several examples, of which I shall now scarce alledg any other, then that famous place in France known by the name of Les Caves Gentieres, where the Water falling from the upper Parts of the cave to the ground does presently there condense into little stones, of such figures as the drops, falling either severally or upon one another, and coagulating presently into stone, chance to exhibit. Of these stones some Ingenuous Friends of ours, that went a while since to visit that place, did me the favour to present me with some that they brought thence. And I remember that both that sober Relator of his Voyages, Van Linschoten, and another good Author,