File:Geological magazine (1883) (14764864752).jpg

Identifier: geologicalmagazi210wood (find matches)
Title: Geological magazine
Year: 1883 (1880s)
Authors: Woodward, Henry, 1832-1921, ed
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Publisher: London (etc.) Cambridge University Press
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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the short-period oceantides, classing with these even the monthly tides due to the ellipti-city of the moons orbit (he has given up the argument from pre-cession). But he himself declared in his Address to the PhysicalSection of the British Association, at Glasgow, in 1876, that theabsence of any indication of a 18-6-year ocean tide, depending onthe revolution of the moons nodes, could not be easily explainedwithout assuming or admitting a considerable degree of yielding inthe body of the earth. That is to say, our earth, as a whole, is aviscous, or practically viscous, solid, which, notwithstanding itsapparently very high rigidity when tried by reciprocating stresses ofshort period, may be able to yield to the full satisfaction of geologiststo a sufficiently long-continued pressure, such as that of a greatdepth of ice in high latitudes during the Glacial period. I omitsome other considerations which go to strengthen this conclusion. M. Ii. Close.University Club, Dublin, Nov. 7, 1882.
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£ THE GEOLOGICAL MAGAZINE. NEW SERIES. DECADE II. VOL. X. No. II.—FEBRUARY, 1883. OZR/IG-IZLsT^Ij abticles. I.—On the Foliage of Sigillaria Serlii, Brongn. By ¥m. Carrttthers, F.H.S., F.G.S. ;Keeper of the Botanical Department, British Museum (Natural History). (PLATE II.) THE rarity of specimens of Sigillaria with foliage attached makesthe specimen figured on Plate II. of great value. Since Lindleyand Hutton figured a fragment of Sigillarian leaf, and from itsnervation referred it to Cyperacece under the designation of Oyperitesbicarinata (plate 43), not a little has been done to elucidate thefoliage of this important genus. Brongniart, in one of the latest plates (161) of his great work,figures the bases of long parallel-sided leaves proceeding from thefragment of a large stem marked with ridges and furrows, andbelonging to the restricted genus Sigillaria. To this plant he gavethe name S. lepidodendrifolia. Other figures of species of the samegroup have been published (see Gei

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