Scenery, Science and Art: Being Extracts from the Note-book of a Geologist and Mining EngineerJ. Van Voorst, 1854 - 323 páginas |
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Página 7
... occasionally swell out to a dozen yards , and it would not be easy for a person unaccustomed to examine coal to recognise in the flaky shining powder brought up , or the earthy stain seen at the surface , any valuable indications worth ...
... occasionally swell out to a dozen yards , and it would not be easy for a person unaccustomed to examine coal to recognise in the flaky shining powder brought up , or the earthy stain seen at the surface , any valuable indications worth ...
Página 14
... occasionally burns spontaneously for a long time , pro- ducing a singular appearance , not unlike that which may be seen sometimes near Newcastle , where the slack or small coal is left in heaps at the pit - mouth . Fig . 2 .-- Section ...
... occasionally burns spontaneously for a long time , pro- ducing a singular appearance , not unlike that which may be seen sometimes near Newcastle , where the slack or small coal is left in heaps at the pit - mouth . Fig . 2 .-- Section ...
Página 19
... Occasional bands of pyrites occur , but may easily be avoided , and some rich ochraceous portions may be noticed . In the state in which I saw it , this bed would give at least ten thousand tons of ore ( equivalent to two thousand tons ...
... Occasional bands of pyrites occur , but may easily be avoided , and some rich ochraceous portions may be noticed . In the state in which I saw it , this bed would give at least ten thousand tons of ore ( equivalent to two thousand tons ...
Página 21
... occasionally changes its character , containing small crystals of hornblende . The quartz near the surface I observed to be constantly discoloured with phosphate of lead , frequently forming incrustations . On the whole , there are ...
... occasionally changes its character , containing small crystals of hornblende . The quartz near the surface I observed to be constantly discoloured with phosphate of lead , frequently forming incrustations . On the whole , there are ...
Página 30
... occasionally a peculiar moss which is specially pre- pared for this purpose . About 100 women are employed in the manufacture and preparation of the cheeses , and the quantity made in a year is stated at 30,000 cwt . 31 CHAPTER THE ...
... occasionally a peculiar moss which is specially pre- pared for this purpose . About 100 women are employed in the manufacture and preparation of the cheeses , and the quantity made in a year is stated at 30,000 cwt . 31 CHAPTER THE ...
Outras edições - Ver tudo
Scenery, Science and Art: Being Extracts from the Note-book of a Geologist ... David Thomas Ansted Visualização integral - 1854 |
Scenery, Science and Art: Being Extracts from the Note-book of a Geologist ... David Thomas Ansted Visualização integral - 1854 |
Scenery, Science and Art: Being Extracts from the Note-book of a Geologist ... David Thomas Ansted Visualização integral - 1854 |
Palavras e frases frequentes
abundant Algiers Alpujarras Amposta appears Aubin Aveyron bands basalt beauty beds Berja Cagliari chain character Cheliff Cherchel chiefly Chiffa coal coal-field coast coloured commenced considerable consists constructed copper crossing cultivated Délémont deposits distance district east Ebro elevation entering exist extending extremely feet France French gorge gossan granite ground hills houses inhabitants interesting interior island Kanawha kind labour land less limestone lode lofty Madrid Mediterranean miles mineral mines Moorish mountains Mouzäia natural nearly numerous obtained occasionally occupied Ohio oolite passing peculiar picturesque Pittsburg plains Porrentruy present principal Pyrenees pyrites quantity quartz range reached remarkable rich ridge rising river road rocks Rodez Roman Sahel sandstone Sardinia scenery schists seams seen shales side Sierra Nevada soon Spain Spanish stream surface Tarragona Tenez tertiary thickness tion town tract traveller valley various vegetation veins village walls whole
Passagens conhecidas
Página 292 - The ore in both cases is an auriferous pyrites, occurring in a whitish or white schist. The vein is worked at a depth of 90 feet or thereabouts, but has been proved to 160, and remains uniform. It yields about 6 dwts.