The discourse made before the Royal Society the 26 of November 1674. Concerning the use of duplicate proportion in sundry important particulars together with a new hypothesis of springing or elastique motions / By Sir William Petty.
- William Petty
- Date:
- 1674
Licence: Public Domain Mark
Credit: The discourse made before the Royal Society the 26 of November 1674. Concerning the use of duplicate proportion in sundry important particulars together with a new hypothesis of springing or elastique motions / By Sir William Petty. Source: Wellcome Collection.
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![[78 ] to be feen 2 leagues , aniitn will make experiment heredi( of, mutt firft confider, howpi many miles in thicknels «@») a Middling, Clear, and Diii aphanous Air domake a Opaque. For we find, thay although avery thin plattiy der our fight of near Obi; we alfo know, that grea number of them ¢ fuppoiil one hundred ) can {care} be feen through at alll Heres](https://iiif.wellcomecollection.org/image/b30327283_0120.jp2/full/800%2C/0/default.jpg)
