https://books.google.com/books?id=TFpDAAAAIAAJ&pg=PA214 page 214, paragraph 423 The sun and moon, when partially covered by light, fleecy clouds, are often seen encircled by one or more colored rings, which are called coronæ. […] In order to examine coronæ about the sun, it is best to view them by reflection from a blackened mirror, by which means the brilliancy of the sun's light is very much reduced. […] https://books.google.com/books?id=TFpDAAAAIAAJ&pg=PA215 page 215, paragraph 425 Coronæ are produced by the diffraction of the rays of light in their passage through the small intervals between the particles of condensed vapor in a cloud.

unlocks their [clay's] binding Quality.

Some blacks don't want to deal with the black cop because they see him as an Uncle Tom, a person who stands by while the white cop abuses and shows disrespect toward other blacks.

Drying oils are used as the bases of many paints and varnishes.