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Now, the true difference of the heights of these two points, according be the Ordnance Survey, is 667ft., the Leicester Museum being 237ft., and the Town Hell, Derby, 159ft. above mean or half-tide sea level at Liverpool, the error in determination being 2ft. only.
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Adding this difference of 667ft. to the known height of the Museum above the sea (237ft.) we get 904ft as the height of Bardon Hill, while the height obtained by levelling is 902ft.
Marine Zoology at Arran.
By W. R. Hughes, Esq., F.L.S.
In the early autumn of 1873 upwards of twenty members of the Birmingham Natural History and Microscopical Society ventured upon a marine excursion at Teignmouth, on the south coast of Devon. The weather in a somewhat rainy year proved very fine, consequently dredging was pursued daily on board the yacht "Ruby," hired for the purpose, and there were regular botanical and geological excursions in the neighbourhood for those who were minded to go, as well as a special excursion to Kents Cavern. Upwards of a week was thus passed pleasurably and profitably, many interesting forms of marine life being taken. On the whole the experiment gave such general satisfaction that it was determined to repeat it this year (1877) on a more extended scale, and in a locality which should, as far as possible, offer a decided contrast to that previously visited. The Island of Arran was selected, and the results were equally satisfactory. About twenty members—ladies and gentlemen—formed the party; the arrangements were left to a small Sub-Committee, and, as the number of members was sufficiently large, very favourable terms were granted by the Midland Railway Company, and the luxury of a Pullman Sleeping Car was indulged in at a moderate expense. A small sum—about a sovereign—was contributed by each member to a common fund, and thus a boat for dredging, or a carriage for land excursions, was at the service of the members daily as they felt inclined, An admirable general account of the proceedings having already been given [1] by one whose kindly disposition and richly-
- ↑ Birmingham Natural History Society. "Excursion to Arran."—Birmingham Daily Post, Monday, Sept. 10th, 1977.
