. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. 104 THE DAWN OP LIFE. need we be astonished at the fineness of the infil- tration by which these minute tubes, perhaps xoio o ^^ an inch in diameter, are filled with mineral matter. The micro-geologist well knows how, in more modern deposits, the finest pores of fossils are filled, and that mineral matter in solution can penetrate the smallest openings that the microscope can detect. Wherever the fluids of the livi
. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. 104 THE DAWN OP LIFE. need we be astonished at the fineness of the infil- tration by which these minute tubes, perhaps xoio o ^^ an inch in diameter, are filled with mineral matter. The micro-geologist well knows how, in more modern deposits, the finest pores of fossils are filled, and that mineral matter in solution can penetrate the smallest openings that the microscope can detect. Wherever the fluids of the living body can penetrate, there also mineral. Fig. 26. Shell from a Silurian Limestone, Wales ; its cavity filled with a Hydrous Silicate. Magnified 25 diameters. substances can be carried, and this natural injection, efi'ected under great pressure and with the advantage of ample time, can surpass any of the feats of the anatomical manipulator. Fig. 25 represents a micro- scopic joint of a Crinoid from the Upper Silurian of New Brunswick, injected with the hydrous silicate already referred to, and fig. 26 shows a microscopic. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dawson, John William, Sir, 1820-1899. London, Hodder & Stoughton
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectpaleontology, bookyea
