he water deposited upon the external for the production and development of large surface of the cave has percolated through crystals were a moist air, at a low tempera- the interstices of the rock and penetrated ture, and the presence of a quiet, undis- to the interior. The result is the forma-… … vary in their shape of formation as the outer edges of the hexagon according to their nature. That the central face, which the difference in the is left undeveioped formation of the rock- and hollow owing to salt crystals and the the dearth of material. potassium chloride This growth is con-…
Internet Archive · Public domain (published before 1931). Free to use for anything.
