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| Keywords: The Quarterly journal of the Geological Society of London (12645333963).jpg 1849 <br> BROWN ON ERECT SIGILLARI <br> 357 <br> The exact position of the tree with reference to the underlying coal <br> is shown in the section fig 6 Immediately over the coal there is a <br> Fig 6 <br> Coal seam <br> bed of hard shale six inches in depth in which no fossils are found ; <br> this is overlaid by a softer shale abounding in coal plants ; all the up- <br> right stumps which I have examined are rooted in the six-inch shale ; <br> the crown of the base of that which I am now describing is just four <br> inches above the coal ; its roots dip gradually downwards until they <br> come in contact with the coal at about eighteen inches from the centre <br> of the tree and then spread out over its surface When this fossil <br> was brought out of the mine the under side was covered up with hard <br> shale to which about one inch of coal adhered ; in cutting away this <br> layer of coal I met vdth the termination of a perpendicular root im- <br> mediately in contact with the coal which I carefully developed ; pro- <br> ceeding in this manner my patience was amply rewarded by the dis- <br> covery of a complete set of conical tap roots arranged in the order <br> represented in fig 7 which is an horizontal section of the inverted <br> base or underside of the <br> stump on a scale of one- <br> twelfth of the natural <br> size It will be observed <br> that the horizontal roots <br> branch off in a remark- <br> ably regular manner the <br> base being first divided <br> into four equal quarters <br> by deep channels running <br> from near the centre to- <br> wards the points indi- <br> cated by the letters i k <br> I m; an inch or two fur- <br> ther on each of these <br> quarters is divided into <br> two roots which as they <br> recede from the centre 35269007 109512 51125 Page 357 Text v 5 http //www biodiversitylibrary org/page/35269007 1849 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 5 1849 Geology Periodicals Smithsonian Libraries bhl page 35269007 dc identifier http //biodiversitylibrary org/page/35269007 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-20 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12645333963 2015-08-27 10 57 57 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1849 Photos uploaded from Flickr by Fæ using a script | ||||
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