Of strange (j las j es.

to be cut out of icjbuc the side of the Hexagon seal be contrary to this,for the quant i-ty of that must be received by a Convex fable , that the arch of it may so Hick forth:Then take a foil of Wax or Lead, of icotfv'tnient thickness, that exceeds the breadthof the arch of the Hexagon , and in length exceeds, tfttrti both : Then ctook thisplate so, that it may exatfly fland in the hollow of the wood, that there be no (paceor.chink left between them j. then let .the Convex superficies that is ’ preserved pro-minent bdalpplied inwardly,, according to the breadth of it ; that theform ot tieConcavity-may not; be against the Convexity , but that the same plate may receivebotb:pornofl»without impediment: Having thus made yritar model^iakeyour GlasstJfflcel, otofiome other mixture, as I shall fhew you • and when iris polislicd*icwill fhew>ymmaay diversns-s of Images.. First, t he rigbr parts wih/hew right* andthe left the left, whereas the nature of plain Glafles, is to fhew the right side asleft, and the left side as right: and if you go backwards , the: Image will seem pro-portionable, and will cosneforward: if you come more towards the Convex super-ftciesp -the image will thew ugly; and the neerer youcome, the uglier Will it (hew,and be.moiie like a horses head- If yctrinclinctheGlals, that will indibdVoof andby varying the Glass, and thesituation of it, you shall’ perceive divers’ variations ;sometimes the head down , and the heels up-p and ybu fhaitTW twaoy ©fclier-thingsthat I think not needful to relate now: for being placed ^n a voluble set, that itmay fhew both pates befhife-and behind, the fpcSfator of himself may see all things.We may ; ‘ U f

•»;- Make a Glass tut «f all ,

that in that alone all Images may be seen , that are seen in all: many mouths; some-times greater, sometimes sets, sometimes right,sometimes left, some neerer, some far-ther off, seme equidifianr. if a crooked be (et in one place* in another a Concave,and a plain one in the middle, you shall see great diversity of Images These are

The operations of a ( onvex Cylindrical Glass.

When your face is against it, the mere deformed it appears iff length, the more uglyit is for slenderness: if the length of it cut the face overthwart, it shews a low pres-sed down face like a Frogs, that you shall fee nothing but the teeth: almost the fameway, as you shall see it in a Sword, or any other long and polished steel : if you in-cline it forward, the forehead will appear very great, the chin small and slender likea horses. But contrary to these are

The operations of fyltndrical Concave-glasses.

If you look into the Concave, you shall see more Images of the seme thing, imitatingthe said Glass. If you (et your eye to the Centre, you shall fee it all the breadth ofthe Glass ; so your forehead, mouth, and the rest. If you turn such a Glass, thatit may cut your face broid-ways, you (hall presently see your head inverted, andthe rest that I related in the Concave-gliss.

The opera'ions of a Pyramidal Glass turned,

are these: You (hall fee a (harp forehead, and a large chin. Bur the contrary way,a long forehead, with a very long nose. Int Concave you shall behold many faces jif according to the concavity you fit many portions of plain Glasses: for one lookinginto it, shall find them as manv as there are Glasses, and all moving alike; and again,what Glass soever it be* if it be not plain* it shall (thew always different from theImage.

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