 The larger part of the dust is thought to be a sediment from the air, and to have been obtained by it from a region of crystalline schists. The chondri, on the other hand, are thought to be of cosmic origin, since they are similar to the chondri obtained...  A Summary of Progress in Petrography. in 1887-1896 - Page 14by William Shirley Bayley - 1892Full view - About this book
 | 1891 - 638 pages
...dust (kryokonite) collected by Nordenskjold in Greenland, in 1883, has been submitted to Wiilfing21 for investigation, by whom it has been found to consist...side. A new crystal refractometer has been devised by Czapski.a Its construction and use is carefully described by the inventor in a recent paper in the... | |
 | 1891 - 496 pages
...deep-sea soundings. If the amount of dust collected from the snow in Greenland represents the fall in one year, the total amount falling upon the entire...equivalent to a cube of thirty-one yards on a side. — Am. Naturalist. * • # THE SUN'S DISTANCE, as stated by Prof. Harkness, an American member of... | |
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