Page:Micrographia - or some physiological descriptions of minute bodies made by magnifying glasses with observations and inquiries thereupon.djvu/27

Rh effluvia of Bodies dissolv'd in the Air; Or the particles of bodies dissolv'd or dissoluble in Liquors, or the more quick and violent shaking motion of heat in all or any of these: whatsoever does any wayes promote any of these kinds of criteria, ''does afford a way of improving some one sense. And what a multitude of these would a diligent Man meet with in his inquiries? And this for the helping and promoting the sensitive faculty only.''

Next, as for the Memory, or retentive faculty, we may be sufficiently instructed from the written Histories of civil actions, what great assistance may be afforded the Memory, in the committing to writing things observable in natural operations''. If a Physitian be therefore accounted the more able in his Faculty, because he has had long experience and practice, the remembrance of which, though perhaps very imperfect, does regulate all his after actions: What ought to be thought of that man, that has not only a perfect register of his own experience, but it grown old with the experience of many hundreds of years, and many thousands of men.''

And though of late, men, beginning to be sensible of this convenience, have here and there registred and printed some few Centuries, yet for the most part they are set down very lamely and imperfectly, and, I fear, many times not so truly, they seeming, several of them, to be design'd more for Ostentation then publique use: For, not to instance, that they do, for the most part, omit those Experiences they have made, wherein their Patients have miscarried, it is very easie to be perceiv'd, that they do all along hyperbolically extol'' their own Prescriptions, and vilifie those of others. Notwithstanding all which, these kinds of Histories are generally esteem'd useful, even to the ablest Physitian.''

What may not be expected from the rational or deductive Faculty that is furnisht with such Materials, and those so readily adapted, and rang'd for use, that in a moment, as 'twere, thousands of Instances, serving for the illustration, determination, or invention, of almost any inquiry, may be represented'' even to the sight? How neer the nature of Axioms must all those Propositions be which are examin'd before so many Witnesses? And how difficult will it be for any, though never so subtil an error in Philosophy, to scape from being discover'd, after it has indur'd the touch, and so many other'' tryals?

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