1, 1800 - 1814 On the Oblique Refraction of Iceland Cry... On the Oblique Refraction of Iceland Crystal. [Abstract] This is the metadata section. Skip to content viewer section.

He studied the flora and fauna and ice and snowflake formations under ... He made a detail study of refraction both in the Arctic seas and in the North Sea, surveyed and mapped the East Coast ...

When suitably cut and mounted between glass cover-slips, naphthalene crystals exhibit the phenomena of conical refraction in a very striking way, and enable their features to be critically examined.

If Singaporeans had been looking up around noon on Mar. 15, they may have been treated a magnificent "sun halo" over head.

A moon dog, caused by the refraction of moonlight through ice crystals in high-altitude clouds, shows west of Billings at 5 a.m. Wednesday. A total lunar eclipse, "blood worm moon," will occur just ...