Ordnance Trigonometrical Survey of Great Britain and Ireland:--Account of the Observations and Calculations of the Principal Triangulations; and of the Figure, Dimensions, and Mean Specific Gravity of the Earth as derived therefrom. Published by order of the Master General and Board of Ordnance. Drawn up by Captain Alexander Ross Clarke, R.E., F.R.A.S., under the direction of Lieut.- Col. H. James, R.E., F.R.S., M.R.I.A., &c., Superintendent of the Ordnance Survey, pp. 782. 4to. London, … | Zendy

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Ordnance Trigonometrical Survey of Great Britain and Ireland:--Account of the Observations and Calculations of the Principal Triangulations; and of the Figure, Dimensions, and Mean Specific Gravity of the Earth as derived therefrom. Published by order of the Master General and Board of Ordnance. Drawn up by Captain Alexander Ross Clarke, R.E., F.R.A.S., under the direction of Lieut.- Col. H. James, R.E., F.R.S., M.R.I.A., &c., Superintendent of the Ordnance Survey, pp. 782. 4to. London, …

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