A paper, on the patent azimuth and steering compass invented by E.J. Dent ... [together with a paper on the shape of the wheel-teeth in the clock for the new Royal Exchange] / Presented to the ... British Association for the advancement of science ... 1844.

  • Dent, Edward John, 1790-1853
Date:
1844
Catalogue details

Licence: Public Domain Mark

Credit: A paper, on the patent azimuth and steering compass invented by E.J. Dent ... [together with a paper on the shape of the wheel-teeth in the clock for the new Royal Exchange] / Presented to the ... British Association for the advancement of science ... 1844. Source: Wellcome Collection.

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    change in the position of the Needle is dispensed with, and the method of course subject to error, which can only be removed by inversion^ and without which no instrument of the kind can have any claim to accuracy. I trust, by the mode of construction by which I have proposed to remedy the existing evils in Compasses, a very superior Common Binnacle or Steering Compass will be introduced; and another instrument also, for the united purposes of an Azimuth or Surveying Compass and Dipping Needles, having great facility of manipulation, and with every refinement as regards workmanship and quality of the Needles, at a much less price than either of these instruments can be procured for, as they are usually constructed. 82, Strand, September, 1844. Ed. J. dent.