. The Arctic world: its plants, animals and natural phenomena [microform] : with a historical sketch of Arctic discovery down to the British Polar Expedition: 1875-76. British Polar Expedition, 1875-76; British Polar Expedition, 1875-76; Zoology; Zoologie. CKY8TALMZIN(; FOKCE .N ICE. 100 (lesirablo. Every magnet possesses two such poles; and if iron tilings bo scattered over a magnet, each particle becomes also endowed with two poles. Now suppose that similar particles, devoid of weight, and floating in the atmos- phere, come together, what will happen ? Obviously, the repellent poles will ret
. The Arctic world: its plants, animals and natural phenomena [microform] : with a historical sketch of Arctic discovery down to the British Polar Expedition: 1875-76. British Polar Expedition, 1875-76; British Polar Expedition, 1875-76; Zoology; Zoologie. CKY8TALMZIN(; FOKCE .N ICE. 100 (lesirablo. Every magnet possesses two such poles; and if iron tilings bo scattered over a magnet, each particle becomes also endowed with two poles. Now suppose that similar particles, devoid of weight, and floating in the atmos- phere, come together, what will happen ? Obviously, the repellent poles will retreat from each other, while the attractive will approach, and ultimately interlock. Further : if the particles, instead of a single pair, possess several pairs of poles iuranged at definite pcjints over their .suifaces, you can then picture them, in obedience to their mutual attrac- tions and repulsions, building theni- selves together in masses of definite shape and stiucture. \ )u have, then, only to imagine the aqueous particles in cold calm air to be gifted with poles of this descrip- tion, compelling the said particles to assume certain definite aggregates, and you have before your mind's eye the invisible architecture which creates the visible and beautiful crystals of the VARI0D3 FORMS OT SNOW-CRTSTALS. The important part played by this crystallizing force in ice as well as snow, will bo under- stood from the following remarks by Professor Tynda'.l, who may justly be described as the most eminent living authority on the subject :— At any temperature above 32' F.,—that is, freezing-point,—the movement of heat is sufficient to loosen the molecules of water from their rigid bonds of cohesion. But at 32° the movement is so diminished that the atoms lock themselves together, and unite in a solid. This act of union, however, is controlled by well-known laws. To the unintelligent eye a block of ice seems neither more interesting nor more beautiful than a sheet of
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1876
