The Quarterly Journal, Volumen 22John Murray, 1827 |
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Página 293
... Lignite ; its geological connexions differing from those of true coal , even more than its mineral nature . A portion of the coal found under basalt is also included under the same head . The remainder of that which has been improperly ...
... Lignite ; its geological connexions differing from those of true coal , even more than its mineral nature . A portion of the coal found under basalt is also included under the same head . The remainder of that which has been improperly ...
Página 295
... lignites which occur in the upper secondary strata , rather than to the proper coal series ; nor , if I have succeeded in showing that vegetables might have existed in some ancient states of the globe , is there any difficulty in ...
... lignites which occur in the upper secondary strata , rather than to the proper coal series ; nor , if I have succeeded in showing that vegetables might have existed in some ancient states of the globe , is there any difficulty in ...
Página 297
... lignites . To commence with the history of the series itself . As the beds of coal are found accompanying and alternating with stratified rocks , so they are also disposed in strata parallel to these . Such strata are in every respect ...
... lignites . To commence with the history of the series itself . As the beds of coal are found accompanying and alternating with stratified rocks , so they are also disposed in strata parallel to these . Such strata are in every respect ...
Página 301
... lignites , with those of the proper coal series ; the mineral alone , as is too common with geologists in many other cases where rocks are concerned , having formed the chief object of attention , to the exclusion of the geological cha ...
... lignites , with those of the proper coal series ; the mineral alone , as is too common with geologists in many other cases where rocks are concerned , having formed the chief object of attention , to the exclusion of the geological cha ...
Página 305
... lignites . A few examples from that country will tend to throw some light on that which has yet been imperfectly studied ; and it will , at the same time , be seen that the positions of the coal - beds are often remarkable as they ...
... lignites . A few examples from that country will tend to throw some light on that which has yet been imperfectly studied ; and it will , at the same time , be seen that the positions of the coal - beds are often remarkable as they ...
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Términos y frases comunes
achromatic angle aperture aplanatics appears applied ascertained baryta bodies brome carbon cause chemical chloric acid chlorine circumstances coal series colour combination common compound consequently considerable considered containing continued fraction crystals cylinder decomposed degree deposites distance effect electricity elevation employed equal equation exist experiments fact Farn Island feet felspar fire fluid fraction glass gneiss granite heat hydrogen hygrometer inches instrument latter leech length lignites limestone magnetic manganese mass mean mercury metal microscope mineral mixture muriatic nature naval naval architecture needle nitric acid object object-glass observed obtained occur origin oxide oxygen paper pendulum perfect phenomena portion potash present probably produced proportion proved quantity remains remarkable respect result salt sandstone schist secondary strata ships similar solar solution strata substance sulphuric acid supposed surface temperature theory tion trap tube unstratified rocks vapour veins volcanoes weight wire