Annals of Philosophy, Том 22Baldwin, Cradock, and Joy, 1823 |
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Страница 18
... felspar , and even mica , are necessary to its composition ; quartz being always in the greatest quan- tity . The almost absolute want of all useful metals in the whole formation distinguishes it likewise from the transition formation ...
... felspar , and even mica , are necessary to its composition ; quartz being always in the greatest quan- tity . The almost absolute want of all useful metals in the whole formation distinguishes it likewise from the transition formation ...
Страница 35
... felspar so predominates that they have been termed slaty felspar . Judging , however , from their less ready fusibility , from the large proportion of metallic oxides ( iron and manganese ) which they contain , and from the examination ...
... felspar so predominates that they have been termed slaty felspar . Judging , however , from their less ready fusibility , from the large proportion of metallic oxides ( iron and manganese ) which they contain , and from the examination ...
Страница 36
... felspar ; and in one or two instances alternates with thin beds of compact felspar tinged by the admixture probably of chlorite ; a circumstance observable also in the killas of Wheal Maudlin ; and in that which succeeds the granite ...
... felspar ; and in one or two instances alternates with thin beds of compact felspar tinged by the admixture probably of chlorite ; a circumstance observable also in the killas of Wheal Maudlin ; and in that which succeeds the granite ...
Страница 37
... felspar . We may trace the last in those varieties of the slate which , in this country , are contiguous to the granite . * On the other hand , the talcose ingredient of this mixture is more conspicuous in the varieties which occur at a ...
... felspar . We may trace the last in those varieties of the slate which , in this country , are contiguous to the granite . * On the other hand , the talcose ingredient of this mixture is more conspicuous in the varieties which occur at a ...
Страница 38
... felspar and chlorite . Most of its varieties are readily fusible . ( To be continued . ) ARTICLE IX . On the Crystalline Forms of Artificial Salts . By H. J. Brooke , Esq . FRS . ( Continued from vol . v . p . 452. ) In my last ...
... felspar and chlorite . Most of its varieties are readily fusible . ( To be continued . ) ARTICLE IX . On the Crystalline Forms of Artificial Salts . By H. J. Brooke , Esq . FRS . ( Continued from vol . v . p . 452. ) In my last ...
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Често срещани думи и фрази
Albumen and salts ammonia angles animal Annals of Philosophy antimony appear ARTICLE atmosphere Aurora barometer barytes beds blood capric acid carbonate charcoal cleavage coal gas coefficient colour column common considerable contains copper correction crystals degree direction distance distilled earth effect elevation error experiments feet felspar formation globules granite greywacke heat height hydrogen inches instrument iron light lime limestone logarithm magnetic mean measurements mercury metallic method mineral molecules mountains muriatic acid nature nearly needle nitrate observations obtained octahedron oil gas Ordo oscillations oxide oxygen paper parallel phænomena pier planes platina plumbago potash primary form prism produced proportion quantity remarkable respect rhombic dodecahedron rhombic prism right ascension rocks sandstone silver slate solution species specific gravity stars substances sulphuric supposed surface tables temperature thermometer thick tion titanic acid trachyte vapour variation veins vibrations volcano wind
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