Dana, and now commonly used in scientific writings as a specific term for the real Prussian amber.
Dana introduced the term "as" for this rough kind of lava-stream, whilst he applied the term "pahoehoe" to those flows which have a smooth surface, or are simply wrinkled and ropy; these terms being used in this sense in Hawaii, in relation to the local lavas.
Dana, Manual of Geology (New York, 1862); W.
Dana, Characteristics of Volcanoes with Contribution of Facts and Principles from the Hawaiian Islands (New York, 1890); W.
Streeter, Precious Stones and Gems (6th ed., 1898); Dana, System of Mineralogy (1899); Kunz and others, The Production of Precious Stones (in annual, Mineral Resources of the United States); M.