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Rh formed; or of Waters, of which it was coagulated: but Experience teaches me, that the blue Ice is the Concretion of freh Water, which at firt is white, and at length hardens and turns blue; but the greenih Colour comes from Salt Water. 'Tis oberved, that if you put the blue Ice near the Fire and let it melt, and afterwards remove it to a colder Place, to freeze again, it does not recover its former blue, but becomes white. From whence I infer, that the volatile Sulpher, which the Ice had attracted from the Air, by its Reolution into Water, exhales and vanihes. Though the Summer Seaon is very hot in Greenland, it eldom caues any Thunder and Lightning; the Reaon of which I take to be the Coolnes of the Night, which allays the Heat of the Day, and caues the ulphureous Exhalations to fall again with the heavy Dew to the Ground. As for the ordinary Meteors, commonly een in other Countries, they are viible in Greenland; as the Rainbow, flying or hooting Stars, and the like. But what is more peculiar Rh