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THese experiments will be found different ac∣cording to the diverse meeting of the Glasses, which commonly are made scuing wise at the end, by which there will be two diverse superficies i•• the Glasse, making the exteriour Angle some∣what raised, at the interiour onely one superficies,
which may bee covered according to ordinary Glasses to cause a reflexion, and so it will be but one Glasse, which by refraction according to the different thickenesse of the Glasse, and different Angles of the scuing forme, doe differently pre∣sent the Images to the eye, as foure eyes, two mouthes, two noses; sometimes three eyes, one mouth, and one nose, the one large and the other long, sometimes two eyes onely; with the mouth and the nose deformed, which the Glasse (impe∣nitrable) will not shew. And if there be an interi∣our solid Angle, according to the difference of it, (as if it be more sharpe) there will be represented two distinct double Images, that is, two entire vi∣sages, and as the Angle is open, by so much the more the double Images will reunite and enter one within another, which will present sometimes a whole visage extended at large, to have foure eyes, two noses, and two mouthes; and by mo∣ving the Glasse the Angle will vanish, and so the two superficies will be turned into one, and the duplicitie of Images will also vanish and appeare but one onely: and this is easily experimented with two little Glasse of steell, or such like so uni∣ted, that they make diverse Angles and inclina∣tions.
THirdly, there are Glasses which make men seeme pale, red, and coloured in diverse man∣ners, which is caused by the dye of the Glasse, or the diverse refraction of the Species: and these which are made of Silver, Latine, Steele, &c. doth give the Images a diverse colour also.
In which one may see that the appearances by some are made faire, younger or older than they are; and contrarily others will make them foule and deformed: and give them a contrary visage, for if a Glasse bee cut as it may be, or if many peeces of Glasse bee placed together to make a conveniable reflexion: there might be made of a Mole (as it were) a mountaine, of one Haire a Tree, a Fly to be as an Elephant: but I should be too long if I should say all that which might be said upon the property of Glasses. I will there∣fore conclude this discourse of the properties of these Glasses with these foure recreative Pr••∣blemes following.