Abstract
THIS recently published Professional Paper of the Ordnance Survey gives an interesting account of the revision Of a line of precise levelling which had been carried out under the direction of a committee of the British Association in the years 1837 and 1838. The line was run from Axmouth, on the coast of the English Channel, to three points on the southern coast of the Bristol Channel, and the terminal points were marked with metal bolts βto afford a basis for a comparison with the position of the lines then determined, at present, and at any future period.β When the revision of the primary levelling network of Great Britain was undertaken the revision of this particular line was included in order to see whether there was any indication of earth movement, and in the course of the last three years it has been found practicable to carry out this work by the reserve levelling staff which has to be maintained at Southampton. The earlier levelling was carried out by Mr. T. G. Bunt, and full details are given by Dr. W. Whewell and him in the report of the British Association for 1838.
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L., H. Precise Levelling in the West of England. Nature 100, 16 (1917). https://doi.org/10.1038/100016a0
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DOI: https://doi.org/10.1038/100016a0