| OCR Text |
Show Creeitland'a Dust. The cosmic dust collected by Nor-denskjold Nor-denskjold in Greenland, in 1883, has been submitted to scientific examination, examina-tion, and found to consist chiefly of feldsspar, quartz, mica and hornblende, with a smaller proportion of some other common minerals, a nitrogenous organic substance, and some particles similar to those obtained in deep-sea soundings. It is believed that the last named material has come from space, and that the other substances have been carred in the air from a region of crystalline schists. If the dust taken from tho Greenland snow represents repre-sents the fall of one year, the total annual an-nual fall on the earth's entire surface ii equivalent to a cube of thirty-one yards on a side. |
