Crystal gazing

Year Published: 1954

Description: Shows how some of the crystals in limestone caves are formed and then pictures by time-lapse cinephotomicrography the crystallization of the commonplace substances and chemicals. Depicts briefly the work of speleogists and the importance of water in the formation of cave crystals. Shows the formation of microscopic crystals of salt, alum, cough syrup, zinc acetate, oxalic acid, and ammonium chloride and the appearance of some of them under polarized light.