 Wiilfing 21 for investigation, by whom it has been found to consist in greater part of feldspar, quartz, mica, and hornblende. There are present in it also garnet, zircon, magnetite, augite, and sillimanite, and with them is mixed a nitrogenous organic...  A Summary of Progress in Petrography. in 1887-1896 - Page 14by William Shirley Bayley - 1892Full view - About this book
 | 1891 - 496 pages
...kept all through the most bitterly cold months of last year and this. • * * COSMIC DUST. — The cosmic dust (kryokonite) collected by Nordenskjold...in Greenland in 1883 has been submitted to Wiilfing for investigation, by whom it has been found to consist in greater part of feldspar, quartz, mica,... | |
 | 1891 - 638 pages
...based on the examination of seventeen different specimens of the mineral. i Miscellaneous. — The cosmic dust (kryokonite) collected by Nordenskjold in Greenland, in 1883, has been submitted to Wiilfing21 for investigation, by whom it has been found to consist in greater part of feldspar, quartz,... | |
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