Description
Colours observed within layers of mica (figures a-f) with concentric circles of sixteen colours based upon Isaac Newton's observation of colours produced at the contact of two telescope object-glasses (figure g)
from The weather book: a manual of practical meteorology
XXI from Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses with observations and Inquiries thereupon
500 feet in pencil to the right of the photograph
Sunrise on Mount Hood Timberline mb-width 3398 Colours observed within layers of
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