. The dawn of life [microform] : being the history of the oldest known fossil remains, and their relations to geological time, and to the development of the animal kingdom. Paleontology; Life; Paléontologie; Vie. 126 THE DAWN OP LIFE. Ill iM'i' I iiii'i. variable quantities of magnesia, besides a notable amount of potash. This alkali is, however, sometimes wanting, as ap- pears from the analysis of a green-sand from Kent in England, by that careful chemist, the late Dr. Edward Turner, and in another examined by Berthier, from the calcaire grassier, near Paris, which is essentially a serpentine
. The dawn of life [microform] : being the history of the oldest known fossil remains, and their relations to geological time, and to the development of the animal kingdom. Paleontology; Life; Paléontologie; Vie. 126 THE DAWN OP LIFE. Ill iM'i' I iiii'i. variable quantities of magnesia, besides a notable amount of potash. This alkali is, however, sometimes wanting, as ap- pears from the analysis of a green-sand from Kent in England, by that careful chemist, the late Dr. Edward Turner, and in another examined by Berthier, from the calcaire grassier, near Paris, which is essentially a serpentine in composition, being a hydrous silicate of magnesia and protoxyd of iron. A com- parison of these last two will show that the loganite, which tills the ancient Foraminifer of Burgess, is a silicate nearly related in composition. I. Green-sand from the calcaire grassier, near Paris. Berthier (cited by Beudant, Mineralagie, ii., 178). II. Green-sand from Kent, England. Dr. Edward Turner (cited by Eogers, Final Eeport, Geol. N. Jersey, page 206). III. Loganite from the Eozoon of Burgess. IV. Green-sand, Lower Silurian ; Red Bird, Minnesota. y. Green-sand, Cretaceous, New Jersey. VI. Green-sand, Lower Silurian, Orleans island. The last four analyses are by myself. I. Silica 40-0 Protoxyd of iron 24*7 Magnesia IG'6 Lime 3-3 Alumina 1*7 Potash Soda II. 48-5 22-0 3-8 170 traces. Water III. IV. V. VI. 35-14 46-58 50-70 50-7 8-60 20-61 22-50 8-6 31-47 1-27 2-16 3-7 2-49 1-11 10-15 11-45 8-03 19-8 6-96 6-80 8-2 •98 •75 •5 14-64 9-66 8-95 8-5 12-6 7-0 98-9 98^3 100-00 100-00 100-00 100-0. 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, J. W. (John William), Sir, 1820-1899. Montreal : Dawson
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectpaleontology, bookyea
