Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 814
r, the opposite NlMMULITES 757 edge being placed on a firm support ; or, if this method should notsucceed, by heating it in the flame of a spirit-lamp, and then throw-ing it into cold water or striking it edgeways. Nummulites usuallyshow many more turns, and a more gradual rate of increase in… … Fig. 572.—A, piece of Nummulitic limestone from Pyrenees,showing Nummulites laid open by fracture through medianplane; B, Orbitoides. fossil examples of the genus, and which shows no fewer than ten convo-lutions in a fragment that does not nearly extend to the centre of thespire. This section also…
Microscopy
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