Physiologia Epicuro-Gassendo-Charltoniana, or, A fabrick of science natural, upon the hypothesis of atoms founded by Epicurus repaired [by] Petrus Gassendus ; augmented [by] Walter Charleton ...

SECT. III.

ART C.

1 THe opportunity of the present speculation, concerning the C••uses of Per••picuity and Opacity.

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2 The true Notions of a Per••picuum and Opa∣cum.

ibid.

3 That every Concretion is so much the more 〈◊〉〈◊〉 by how much th•• more, and more am∣ple Inane Spaces 〈◊〉〈◊〉 in••••rcepted among its par∣ticles; caeteus pa••••bus.

ibid.

4 Why Glass though much more Dense, is yet much more Diaphanous, than Paper.

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5 Why ••he Diaphanity of Glass is gradually di∣minished, according to the various degrees of its Crassitude.

ibid.

6 An Apodictical Confutation of that popular Er∣ror, that Glass is totally, or in every particle, Diaphanous.

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