. Narrative of a journey to the shores of the Polar Sea, in the years 1819, 20, 21, and 22 [microform]. Scientific expeditions; Expéditions scientifiques. No. I.] GEOGNOSTICAL OBSERVATIONS. 515 ridge, rising two hundred feet above the spring. A small clayey plain on the S. W. side of the eminence is traversed by the rivulet from the spring, and opens into a bay of the river. A large and apparently-travelled fragment of hornblendic gneiss lies on the acclivity under the spring, but the nearest rocks observed in situ were composed of yellowish-white compact splintery limestone. At the new Fort,
. Narrative of a journey to the shores of the Polar Sea, in the years 1819, 20, 21, and 22 [microform]. Scientific expeditions; Expéditions scientifiques. No. I.] GEOGNOSTICAL OBSERVATIONS. 515 ridge, rising two hundred feet above the spring. A small clayey plain on the S. W. side of the eminence is traversed by the rivulet from the spring, and opens into a bay of the river. A large and apparently-travelled fragment of hornblendic gneiss lies on the acclivity under the spring, but the nearest rocks observed in situ were composed of yellowish-white compact splintery limestone. At the new Fort, a considerable distance above Pierre au Calumet, a lime- stone similar to that last mentioned occurs, having its strata waved or dip- Edinburgh, January 13, 1823. Dear Sir, Enclosed is an account of the experiments performed on the substances you sent me for analysis. First incrustation of white matter from the lake near Carlton-House:— When put into water, it immediately agglutinated, forming minute hard globules which seemed to prevent the farther action of the fluid ; but by heating it, :i was entirely dissolved. The only sub- stance I could detect in the solution by the use of re-agents was sulphuric acid in a state of com- bination. I accordingly suspected that the white matter was effloresced sulphate of soda. To ascertain if I was right in ray suspicions, I dissolved a few grains by the aid of heat, and procured from the solution a beautiful group of regularly-formed prismatic crystals, resembling those of sul- phate of soda, and which effloresced on exposure to a dry air. I consider the white matter then to be merely sulphate of soda deprived of its water of crystallization by long exposure to the atmosphere. Second deposition from the Salt Springs in the Elk River:— When recently broken, it presented in several places groups of irregular-shaped crystals, inter- mixed with a white powdery matter, and with a yellow substance resembling flowers of sulphur. It had a s
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Keywords: ., bookcentury1800, booksubjectscientificexpeditions, bookyear1823
