The Zoologist; A Monthly Journal of Natural History Volume 12-13

The Zoologist; A Monthly Journal of Natural History Volume 12-13

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1854 edition. Excerpt: ...I have now adopted, consists in a four-sided vessel having the back gradually sloping upwards from the bottom at an angle of 45 to 50 degrees, and the consequently extended top sloping slightly downwards and resting on the upper part of the back. The bottom, therefore, becomes necessarily narrow. The front for the purposes of observation, and the top for the admission of light, are to be of glass; the back, ends and bottom being constructed of slate; the whole fixed in a stout framework. The advantages of this arrangement are: ----First. That it allows of a. most extended view of the whole interior of the aquarium. Secondly. That it enables the occupants to resort to water of any depth they may desire, or even to ascend the sloping back and emerge from the water. ' Thirdly. It admits of a much larger surface of water being exposed to the action ofthe light; and F ourthly. The sloping top allows the water which condenses on the glass, from the effect of radiation, to trickle off and return to the aquarium without first resting on the zinc or iron frame-work. I need hardly mentionithat the sloping back is to be covered with light rock-work extending to a short distance above the waterline. ROBERT WARINGTON. List of Land and Fresh Mollusca found in the neighbourhood of Banbury, Oxfordshire. By RICHARD STRETCH, Esq. THE nomenclature of this list is that of Gray's ' Turton's Manual.' Neritina fluviatilis. Not uncommon in the Cherwell, but small. I collected about two dozen specimens in a few minutes. Turton (page 33) limits this species to the southern part of the island; but I have found it at York, along with Planorbis corneus and Cyclas rivicola, which he states are not found further north than N ottinghamshire....show more

Product details

  • Paperback | 372 pages
  • 189 x 246 x 20mm | 662g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236841506
  • 9781236841506