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absorbed acid addition alkali antimony appears arsenic assay baryta bead becomes Behavior bismuth blowpipe blue borax brown carbonate of soda ceding changes char charcoal chloride clear clear bead coal cobalt cold color colorless combined compounds containing Continuation converted cooling copper crystals dark deposit detected dissolves easily examination exposed flame of oxidation forceps Formula fused fusion gives glass glass-bulb green green color grey heated hydrate ignition incrustation infusible insoluble intense iron latter lead leaving less light lime manganese mass melts metallic microcosmic salt Mineral mixed moistened nickel nitrate occurs opaque open tube oxidation flame oxygen piece platinum wire portion potash potassa powder present produce protoxide pure reaction readily reduced reduction flame remains residue silicates silver soluble solution sometimes strong strongly strontia sublimate substance sulphide temperature tion treated tube vapor violet volatilized yellow yields zinc
Сторінка 16 - The operation depends upon a little artifice in blowing through the pipe, which is in reality more difficult to describe than to acquire. " The effect intended to be produced is a continual stream of air for many minutes, if necessary, without ceasing. This is done by applying the tongue to the roof of the mouth, so as to interrupt the communication between the mouth and the passage of the nostrils ; by which means the operator is at liberty to breathe through the nostrils, at the same time that...
Сторінка i - THE BLOW-PIPE : A System of Instruction in its practical use being a graduated course of Analysis for the use of students, and all those engaged in the Examination of Metallic Combinations. Second edition, with an appendix and a copious index. By GEORGE W- PLYMPTON, of the Polytechnic Institute, Brooklyn.