From the variety of reflection, may also be deduc’d the cause why a small breez or gale of wind ruffling the surface of a smooth water, makes it appear black; as also, on the other side, why the smoothing or burnishing the surface of whitened Silver makes it look black; and multitudes of other phænomena might hereby be solv’d, which are too many to be here insisted on. * * * * * Observ. VI. _Of Small Glass Canes._ That I might be satisfi’d, whether it were not possible to make an _Artificial_ pore as _small_ as any _Natural_ I had yet found, I made several attempts with small _glass pipes_, melted in the flame of a Lamp, and then very _suddenly_ drawn out into a great length. And, by _that means_, without much difficulty, I was able to draw some almost as small as a _Cobweb_, which yet, with the _Microscope_, I could plainly perceive[7] to be _perforated_, both by looking on the _ends_ of it, and by looking on it _against the light_ which was much the _easier way_ to determine whether it were solid or perforated; for, taking a small pipe of glass, and closing one end of it, then filling it _half full_ of water, and holding it _against the light_, I could, by this means, very easily find what was the _differing aspect_ of a _solid_ and a _perforated_ piece of glass; and so easily distinguish, without seeing either end, whether any _Cylinder_ of glass I look’d on, were a _solid stick_, or a _hollow cane_. And by this means, I could also presently judge of any small _filament_ of glass, whether it were _hollow_ or _not_, which would have been exceeding tedious to examine by looking on the end. And many such like ways I was fain to make use of, in the examining of divers other particulars related in this Book, which would have been no easie task to have determined meerly by the more common way of looking on, or viewing the Object. For, if we consider first, the very _faint light_ wherewith the object is enlightened, whence many particles appear _opacous_, which when more enlightned, appear very _transparent_, so that I was fain to _determine_ its _transparency_ by one glass, and its _texture_ by another. Next, the _unmanageableness_ of most _Objects_, by reason of their _smalness_, 3. The _difficulty of finding_ the desired point, and of _placing_ it so, as to reflect the _light conveniently_ for the Inquiry. Lastly, ones being able to view it but with _one eye_ at once, they will appear no small _obstructions_, nor are they easily _remov’d_ without many _contrivances_. But to proceed, I could not find that water, or some _deeply ting’d_ liquors would in small ones rise so high as one would expect; and the _highest_ I have found it yet rise in any of the pipes I have try’d, was to 21 _inches_ above the level of the water in the vessel: for though I found that in the small pipes it would _nimbly enter_ at first, and run about 6 or 7 _inches_ upwards; yet I found