XVII.—Chapters on the Mineralogy of Scotland. Chapter Fourth.—Augite, Hornblende, and Serpentinous Change

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Abstract
Malacolite was first observed in Scotland by Dr Macculloch, who included it with the second sub-species, under the name of Sahlite.He, in his different works, noted its occurrence—“near the church of Rodel in Harris,”- “in Tiree,”-“Glen Elg,”-“Glen Tilt,”-and “in Rannoch.” With his usual power he describes the occurrence, varieties, and even the crystalline form of the mineral,—the clearness and precision of his descriptions being only equalled by the utter want of precision and frequent mystifications as to their localities.The above sentence conveys all the direct information which Dr Macculloch vouchsafes as to the five localities indicated by him, though in a vague manner he may occasionally lead one to conjecture that certain particular spots are meant.By the time that the mineralogist, led by Dr Macculloch to Glen Elg, Tiree, or Rannoch, has walked some twelve or twenty miles in an unsuccessful search, he begins to think that if he be successful, he has some claim to be himself regarded as an independent discoverer.

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