Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 43
say that the index of refraction of Water is 1*336, B OPTICAL PEINCIPLES OF THE MICROSCOPE. we mean that the Bine e e of the angle of incidence e o c of a raypassing into water from a vacuum, is to the sine w w of the angleof refraction w o c, as 1*336 to 1, or almost exactly as !■§ to 1, oras 4 to… … the angle of refraction g o c, as 16 to 1, or as 8 to 5. So in thecase of Diamond, the sine e e is to the sine d d as 2*439 to 1, oralmost exactly as 2| to 1, or as 5 to 2. Thus, the angle of inci-dence being given, the angle of refraction may be always found bydividing the sine of the former by…
Microscopy · Biology
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-340-231.webp)
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-351-242.webp)