The book Mineralogy of the Scottish Isles With Mineralogical Observations Made in a Tou was written by author Robert Jameson Here you can read free online of Mineralogy of the Scottish Isles With Mineralogical Observations Made in a Tou book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Mineralogy of the Scottish Isles With Mineralogical Observations Made in a Tou a good or bad book?
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Tranfparency. A very flight degree at the edges.. Fratfure. More or lefs fine fplintery, and very compact. Hardnefs. Gives fire plentifully with fleeL Pieces of quartz are difperfed through it, as in the former j and a few cryftals of felfpar now and then occur. A R R A N. 1 19 N IV. Foffil Jlill more nearly approaching to Quartz, which is intermixed with the green pitch/lone of the great vein D. This fpecies of rock differs little in colour from the prece- ding ; but has more luftre and tranfp...arency, and is a little harder. It acquires a white crufl by the action, of . The weather, It has alfo, interfperfed, cryflals of quartz. -OBSERVATIONS. Thefe different gradations are all to be obferved in the fame vein, and appear to graduate 0r pafs into each other. Thus, the firfl, or brownifh-coloured pitchflone, by its little luflre, feems verging to the fecond ; and, in reality, we often obferve, in'the^fame fpecimens, the one pafTmg into the other. The pitchftone-hornftone fubflance, N II.
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