Letters Concerning the Northern Coast of the County of Antrim
Letters Concerning the Northern Coast of the County of Antrim
William Hamilton
The book Letters Concerning the Northern Coast of the County of Antrim was written by author William Hamilton Here you can read free online of Letters Concerning the Northern Coast of the County of Antrim book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Letters Concerning the Northern Coast of the County of Antrim a good or bad book?
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f This lofs probably arifes from water expelled by the heat.- For in the coorfe of twenty-four hours after, it will have nearly recovered its former weight, particularly if it be rtxoiftencd. COAST OP ANTRIM. 45 In a more confiderable heat it readily melts, and is, as the chymifts exprefs it, fu- fible perfe. When expofed to an intenfe fire it may be vitrified^ forming an opake glafs of a black or blueifh colour. Its principal component parts are iron in a metallic ftate, combined chiefly with ...flliceous and argillaceous earths. Its metallic -principle may be demonftrateJ by a very fimple experimdit.-^Let a fmall fragment of bafaltes, in its natural ftate, be brought into contaft, or very near to a good magnfetical needle, and it may be made to detain the 'i^eedle at a confiderable diftance from its riieridian. Let this fragment be touched by' a magnet, and it will acquire a pretty ftrong polarity, capable of attrafting or repelling the needle at the diftance of an inch or more. From hence it is proved to contain iron in a metallic ftate, becaufe the- cals ' 46 LETTERS concerning the cal^ of that metal k meapable of producing any magaetical phflsiiomena whatever.
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