. Hardware merchandising 1895 . s that theweathering of glass is caused by the decom-posing action of the atmospheric moisture,and that the carbonic anhydride of the airdoes not act directly on the glass, but onlyon the alkaline products of the aqueous de-composition. He further finds that dry car-bonic anhydride is without action on drvglass, and there is no proof that water canbe retained by glass except when it entersinto chemical combination with the appears, too, that the weathering of glassand the decomposition of glass by water aresimilar processes, both being preceded bythe tak
. Hardware merchandising 1895 . s that theweathering of glass is caused by the decom-posing action of the atmospheric moisture,and that the carbonic anhydride of the airdoes not act directly on the glass, but onlyon the alkaline products of the aqueous de-composition. He further finds that dry car-bonic anhydride is without action on drvglass, and there is no proof that water canbe retained by glass except when it entersinto chemical combination with the appears, too, that the weathering of glassand the decomposition of glass by water aresimilar processes, both being preceded bythe taking up of water into the glass mole-cule, but the surface changes caused byweathering are comparatively slight withgood glass, and the action of water onweathered glass is only temporarily morerapid than it is on new glass ; lime glassesare more hygroscopic and weather moreeasily the more easily they are attacked bywater, and, even after long action of water,glass is still capable of being weathered. In the Hands ofthe Consumer.
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