377189r
[Commentary:
This page is part of Harriot's
experiments on refractive colours. A few preliminary calculations concerning the glass prism in these color experiments. In particular, Harriot calculates , the distance between the apex of the prism and the point that the eye observes on the prism, as a proportion of the distance between the prism and the card, . As the measurements on f. 190 record, inches, and feet. If the latter is taken as 10000000, then . ]
C. De coloribus per prisma vitreum.
[Translation: On colours through a glass prism. ]
[Translation: On colours through a glass prism. ]
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