Of strange (y last es. ;6i

7 hat aS thingsshad seem greater.

Set your head below that poinr, and you shall behold a huge Face like a monstrousBacchus, and your finger as great as your arm: So worticn pull hairs off their eye*brows, for they will shew as great as fingers. Seneca reports that Hostius Made itichConcave-GUffes, that they might make things shew greater ; He was a great pro*vokcr to luff ; so ordering his Glasses, that w hen he was abused by Sodomy, he mightfee all the motions of the Sodomite behind him, and delight himself with a false re-presentation of his privy parts that shewed so great.

To kindle fire with a (soncave-Glass*

This Glass is excellent above others, for this, that it unites the beams ft) strongly,thatit will shew forth a light Pyramis of its beams, as you hold it to the Sun ; and if youput any combustible matter in the centre of it, it will presently kindle and flame,that with a little stay will melt Lead or Tin, and will mike Gold or Iron red hot !and I have heard by feme, that Gold and Silver have been melted by it; more slow-ly in winter, but sooner in summer, because the medium is hotter; at noon ratherthan in the morning, or evening for the same reason.

To make an Image seem to hang in the Air^ by a Concave-Class.

This will be more wonderful with the segment of a circle, for it Will appear fartherfrom the Glass. If you be without the point of Inversion , you shall sec your headdownwards. That with fixed eyes, and not winking at all, yon may behold thepoint, until it comes to your very sight: For where the Cathetus shall cut the lineof reflection, there the species reflected will seem almost parted from the Glass: theneerer you are to the Centre, the greater will it be, that you will think to touch itwith your hands: and if it be a great Glass, ycu cannot but wonder - for if any manrun at the Glass with a drawn sword , another man will seem to meet him, and torun through his hand. If you shew a Candle, you will think a Candle is pendu-lous lighted in the Air. But if you will

That the Image of a Concave-Glafs should go out far from the Centra ;when you have obtain’d the Image of the thing in its point,if you will have it fartherdistant from the Centre,and that the Picture of a thing shall be farther stretched forth,then you shall decline from the point a little toward the right or left hand, aboutthe superficies of the Glass, and the Image will come forth the farther , and willcome to your sight: There, namely where the Cathetus doth the farthest off that ispossible touch the line of reflection, which few have observed :from which principlemany strange wonders may be done. When you have this, you may easily

Tfeflett heat) cold, and the voice too , by a Cone ave-Glafs.

If a man put a Candle in a place, where the visible Object is to be set, the Candlewill come to your very eyes, and will offend them wi h its heat and light. But thisis more wonderful, that as heat, so cold, should be reflected : if you put snow irtthat place , if it come to the eye , because it is sensible, it will presently feel thecold. But there is a greater wonder yet in it; for it will not onely reverberate heatand cold, but the voice too, and make an Eccho ; for the voice is more rightly re-flected by a police and smooth superficies of the Glass, and more compleatly than byany wall. I prove this, because, if a man turn his face to the Glass, and his friendstand far behind his back, when he beholds his face, he shall decline his face fromthe point of Inversion; but on the right hand, about the superficies of the Glass, andhis face will come forth far from the Glass, and will seem very great about the faceof his friend: Whatsoever he shall speak with a low voyce against the Glass, he shallhear the same words and motions of his mouth, and all motioD from the mouth ofthe reflected Image; and they that stand in the middle between them, shall per-ceive nothing at all. But he that would send his own Image to his friend, must ob-serve till his head shall coane to the Glass. It is profitable also