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Richardson, Sir Ralph, Clayton, Henry, MacCallum, P
On Peat as a Substitute for Coal, Including Details of I. the Dublin Peat Commission (Alderman Purdon's), 1872.-II. Clayton's (London) Condensed-Peat Patent, 1873.-III. MacCallum's (Dunfermline) Coal-Peat Invention, 1873, Etc.
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