A Chapter in the History of Meteorites

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Dulau & Company, 1887 - Meteorites - 224 pages
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Page 201 - The masses are rough and knotted, like mulberry calculi, with rounded protuberances projecting from the surface on every side. The black coating is not uniform, being most marked between the projections. These projections have sometimes a bright metallic surface, showing them to consist of nodules of iron; and they also contain lumps of an olive-green mineral, having a distinct and easy cleavage. The greater part of the stony material is of a grey colour with the green mineral irregularly disseminated...
Page 210 - I to l milligram per square metre, and probably the whole fall of dust for the year far exceeded the latter figure. But a milligram on every square metre of the surface of the earth amounts for the whole globe to five hundred million kilograms (say half a million tons) ! Such a mass collected year by year during the geological ages, of a duration probably incomprehensible by us, forms too important a factor to be neglected, when the fundamental facts of the geological history of our planet are enumerated....
Page 197 - This lake is fmall ; about a mile and a half in length, and half a mile in breadth ; of an oblong form; fweeping at one end, round a woody promontory.
Page 38 - ... which feed these streams lie towards the east, on a slowly rising undulating plateau, on the surface of which not the slightest trace of stone or larger rock -masses was observed. The actual position of this material, to which...
Page 39 - ... run on shore owing to the obscurity of the atmosphere. It has often fallen on ships when several hundred, and even more than a thousand miles from the coast of Africa, and at points sixteen hundred miles distant in a north and south direction.
Page 194 - It is stated by Prof. Shepard to closely resemble the meteorite of Pegu, India (27th December, 1857), and to consist of dark ash-grey spherules (Boltonite), imbedded in a nearly white pulverulent matrix, "chladnite," olivine in distinct grains, nickel-iron, and a little troilite. The specific gravity of a fragment partially covered with crust was 3-65. According to Prof. Kirkwood its elevation at Bloomington, where it was well noticed, was fifteen degrees, and it is calculated that the length of...
Page 49 - Low. 1872— 304. had, at one time, lifted it easily from the ground ; now, no single man can carry it. Not very long before Captain Butler saw this meteorite, it had been removed from the hill on which it had so long rested and been brought to Victoria. When the Indians found that it had been taken away, they were loud in the expression of their regret. The old medicine-men declared that its removal would bring great misfortune, and that war, disease, and dearth of buffalo would afflict the tribes...
Page 209 - I too now examined them more closely, but unfortunately not until the morning after we had left the ice-field, and then found that the supposed ooze consisted of pale yellow crystals (not fragments of crystals) without mixture of foreign matter. The quantity of crystals, which were obtained from about three litres of snow, skimmed from the surface of the snow on an area of at most 10 square metres, amounted to nearly 02 gram. The crystals were found only near the surface of the snow, not in the deeper...
Page 40 - Nordenskjold extracted, by means of the magnet, from a large quantity of material, sufficient particles to determine their metallic nature and composition. These grains separate copper from a solution of the sulphate, and exhibit conclusive indications of the presence of cobalt (not only before the blowpipe, but with solution of potassium nitrite), of copper, and of nickel, though in the latter case with a smaller degree of certainty, through the reactions of this metal being of a less delicate character.
Page 38 - August 8 the snow covering the drift ice, at lat. 80 N. and long. 13 E., was observed to be thickly covered with small black particles, while in places these penetrated to a depth of some inches the granular mass of ice into which the underlying snow had been converted. Magnetic particles were abundant, and their power to reduce copper sulphate was established. Again, on September 2, in lat.

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