. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. THE FLORA OF THE COAL FORMATION. 495 l!<i< :« Y shortly the particularly L'ials, adopted selected con- r portions of julation from treated with joiling-poiut, )us acid were laterial could ransparcncy. 3 sufficient to recent wood the charcoal water before water, with tructurcs ob- ed desirable, tion. Some washing and ictures could mdred speci- ith any tha
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. THE FLORA OF THE COAL FORMATION. 495 l!<i< :« Y shortly the particularly L'ials, adopted selected con- r portions of julation from treated with joiling-poiut, )us acid were laterial could ransparcncy. 3 sufficient to recent wood the charcoal water before water, with tructurcs ob- ed desirable, tion. Some washing and ictures could mdred speci- ith any that nize the coal The change Inch is oxi- especially of luses of the he prepared and leaving rieous lining, ct integrity, continuous, ition. The g its firmer vcid process, !al character of the more :oss-sections commended by and a better view of the general arrangement of the tissues than can be obtained from the shreds of woody matter resulting from the process above described. It is further necessary to state that, to compare specimens of coal with the structures of mineralized plants from the accompanying beds, it is not sufficient to have slices of the latter. It is necessary also to huve specimens prepared by removing the mineral matter by an acid. Most of the coal fossils showing structui'e are mineralized by the car- bonates of lime and iron; and on removing these, the cell-walls will be found intact and sometimes apparently not even carbonized. Diluted hydrochloric acid suffices for this; and structures by no means to be found in the comparatively rude slices prepared by the lapidary can be distinguished in these isolated cells. Pyritous fossils, so intractable as slices, can usually be resolved by the treatment with nitric acid, though in some cases they require a preliminary roasting, or, what is better, exposure to the weather until the pyrites begins to crumble. The observer using the above method will find many vegetable fibres showing no markings. These are usua
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
