The Edinburgh New Philosophical Journal
Format: Paperback
ISBN13: 9780217947596
Paperback|9780217947596
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: is 4600 fathoms, or 27,600 feet; no bottom was obtained; this was the result of an experiment by Captain Sir J.Clarke Ross, in lat. 15 S., and 23 W. long. Several experiments have been made at other points, and some with sucpess, bottom being obtained in apparent mid-ocean, in between 12,000 and 18,000 feet. The ocean has been penetrated in too few places to afford any satisfactory or decisive results upon so interesting a subject; and considering the vast space of our globe occupied by the great ocean, it cannot but strike every one what a wide field is open for investigation and experiment, and how many interesting geological results may be elicited and are connected with these experiments; sufficient facts have been developed, to prove that the inequalities of the level of the ocean's bed are much more remarkable than those of the land. It may excite surprise, that we should know so little on this point. Navigators, to whom this interesting inquiry properly belongs, have troubled themselves little about it. unless it was in some way connected with the safety of their voyages. The existence of discoloured water has alone induced them to past the deep-sea lead. There is, however, some excuse to be made; for though in theory the depth is easily to be arrived at, yet to obtain it practically is exceedingly troublesome, requiring much time as well as favourable opportunities. The mode still practised is the ordinary lead-line. Substitutes for this have been attempted; many of them are ingenious, and sotnc useful, but they do not obviate the difficulties, although they give greater accuracy in the results. Few are aware, that it requires from two to three hours for a well-appointed vessel to make a sounding to the depth of 1500, or 2000 fathoms, for which opportunities seldom ...
| ISBN-13 | 9780217947596 |
|---|---|
| ISBN-10 | 021794759X |
| Weight | 1.15 Pounds |
| Dimensions | 9.00 x 6.00 x 0.79 In |
| List Price | $24.86 |
| Format | Paperback |
|---|---|
| Pages | 356 pages |
| Publisher | |
| Published On | 2009-08-01 |
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