Keywords: Theory of the Earth Hutton Ill 1.png Theory of the Earth Plate I BUT what I would here more particularly represent is the transverse section of those longitudinal siliceous bodies These are seen in fig 1 2 and 3 They have not only separately the forms of certain typographic characters but collectively give the regular lineal appearance of types set in writing <br /> <br /> the siliceous substance is to be considered as included in the spar and as figured according to the laws of crystallization proper to the sparry ground; but the spar is also to be found included in the quartz IT is not indeed always perfectly included or inclosed on all sides; but this is sometimes the case or it appears so in the section Fig 5 6 7 8 9 and 10 are those cases magnified and represent the different figured quartz inclosing the feld-spar In one of them the feld-spar which is contained within the quartz contains also a small triangle of quartz which it incloses Now it is not possible to conceive any other way in which those two substances quartz and feld-spar could be thus concreted except by congelation from a fluid state in which they have been mixed http //www gutenberg org/files/12861/12861-h/12861-h htm 1788 1795 James Hutton PD-old-100 Theory of the Earth |