The Encyclopaedia Britannica: A Dictionary of Arts, Sciences and General Literature, 10. köideA. et C. Black, 1879 - 856 pages |
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Page 56
... quartz , in general distinctly stratified , or at least schistose . The position of its beds is various . Towards the west- ern shore they are vertical , easily splitting by intervening mica plates , and affording good building stone ...
... quartz , in general distinctly stratified , or at least schistose . The position of its beds is various . Towards the west- ern shore they are vertical , easily splitting by intervening mica plates , and affording good building stone ...
Page 130
... quartz and topaz , and later he obtained amorphous from ordinary phosphorus by means of the electric current . He is best known as the inventor of the sealed glass tubes which bear his name , by means of which are exhibited the ...
... quartz and topaz , and later he obtained amorphous from ordinary phosphorus by means of the electric current . He is best known as the inventor of the sealed glass tubes which bear his name , by means of which are exhibited the ...
Page 137
... quartz , glazed clay . Mr King classes them under supplied with emery ( σμίρις or σμύρις , naxium ) . The four periods , beginning as early as 2234 B.C. Ethiopians in the time of Xerxes employed a flint instru- In Egypt the favourite ...
... quartz , glazed clay . Mr King classes them under supplied with emery ( σμίρις or σμύρις , naxium ) . The four periods , beginning as early as 2234 B.C. Ethiopians in the time of Xerxes employed a flint instru- In Egypt the favourite ...
Page 225
... quartz is expressed by the number 114 , that of basalt by 273 , while that of cannel coal stands very much higher at 1538 , or more than thirteen times that of quartz.1 It is evident also that , from the texture and structure of most ...
... quartz is expressed by the number 114 , that of basalt by 273 , while that of cannel coal stands very much higher at 1538 , or more than thirteen times that of quartz.1 It is evident also that , from the texture and structure of most ...
Page 227
... Quartz ( SiO , ) occurs either crystallized as rock - crystal , or non- crystalline as calcedony . In the former condition it is an essential constituent of granite , felsite , and many other igneous rocks , as well as of sandstone and ...
... Quartz ( SiO , ) occurs either crystallized as rock - crystal , or non- crystalline as calcedony . In the former condition it is an essential constituent of granite , felsite , and many other igneous rocks , as well as of sandstone and ...
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abundant acid ancient angle appear augite axis basalt beds carbonic carbonic acid centre century character chemical coal coast cone consists contains crust crystalline crystals deposit distance district earth equator eruption existence feet felspar formations fossils Gaelic Galatia gallic acid galls galvanometer Gaur gelatin gems geological globe gneiss granite Greek heat hornblende igneous igneous rocks important iron islands known lake land latitude lava less lime limestone longitude mass materials matter meridian metamorphic miles mineral mountain observed obtained occur ocean organic original orthoclase parallel Paris passing period plane porphyritic portion present pressure produced quartz regions remains rise river rocks Roman round sand sandstone schists Scotland sediment shales side siliceous Silurian sometimes species specific gravity square miles stones strata stream structure substance surface temperature thick tion town traced upper vapour vertical volcanic voyage whole