when some portion of the metal As the violet-blue tints are the most beautiful, we itcan be turned only by means of a key adapted to gives way, and the ponderous boiler is hurled have devoted most of our attention to them, and have it, and this key may be kept within the control of through the… … shut off from its action on the though, when in contact with air disk, B, without this dangerous ar- and excess of ammonia, it changes rangement of the parts being made to brown in a--few hours, deposi- manifest to any inspector of the ting a black powder, which be- comes blue dissolved in alcohol,…
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