A System of Instruction in the Practical Use of the Blowpipe: Being a Graduated Course of Analysis for the Use of Students, and All Those Engaged in the Examination of Metallic Combinations |
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Page 15
... melts the tallow or wax , which then passes up into the texture of the wick by capillary attraction until it reaches the glowing wick , where the heat decomposes the combustible matter into carbo- nated hydrogen ( C'H ' ) , and into ...
... melts the tallow or wax , which then passes up into the texture of the wick by capillary attraction until it reaches the glowing wick , where the heat decomposes the combustible matter into carbo- nated hydrogen ( C'H ' ) , and into ...
Page 19
... Melt a little molybdenic acid with some borax , upon a platinum wire , about the sixteenth of an inch from the point of the blue cone . In the pure oxidation flame , a clear yellowish glass is formed ; but as soon as the reduction flame ...
... Melt a little molybdenic acid with some borax , upon a platinum wire , about the sixteenth of an inch from the point of the blue cone . In the pure oxidation flame , a clear yellowish glass is formed ; but as soon as the reduction flame ...
Page 22
... melt and run down the side of the candle ; while again , candles do not give heat enough . The lamp is much the most desirable . The subjoined figure , from Berzelius , is perhaps the best form of lamp . It is E α A LAS C B Fig . 5 ...
... melt and run down the side of the candle ; while again , candles do not give heat enough . The lamp is much the most desirable . The subjoined figure , from Berzelius , is perhaps the best form of lamp . It is E α A LAS C B Fig . 5 ...
Page 35
... melts by a low red heat without losing its water of hydration . 3. Bisulphate of Potassa ( KO , 2S0 ' ) .- At a red heat the half of the sulphuric acid of this salt becomes free , and thus separates and expels volatile substances , by ...
... melts by a low red heat without losing its water of hydration . 3. Bisulphate of Potassa ( KO , 2S0 ' ) .- At a red heat the half of the sulphuric acid of this salt becomes free , and thus separates and expels volatile substances , by ...
Page 36
... melts too freely , and therefore it is better to mix it , for blowpipe analysis , with an equal quantity of soda . This mixture has great powers of reduction , and it is easily ab- sorbed by the charcoal , while the globules of reduced ...
... melts too freely , and therefore it is better to mix it , for blowpipe analysis , with an equal quantity of soda . This mixture has great powers of reduction , and it is easily ab- sorbed by the charcoal , while the globules of reduced ...
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Common terms and phrases
alkali alumina antimony arsenic assay baryta Behavior Mineral bismuth blowpipe blowpipe flame blue color borax cadmium carb carbonate of soda ceding Cerium char charcoal Chemistry Chimie chloride clear bead coal cobalt cold colorless colors the flame compounds cooling copper crystals dark edit exposed external flame flame blue flame of oxidation flame of reduction forceps Fuses fusible glass tube glass-bulb green color grey hydrate hydrochloric acid ignition incrusts the charcoal infusible insoluble intumescence iron lead lime lithia litmus paper London magnesia manganese mass melts metallic oxides microcosmic salt moistened nickel Niobic nitric acid opaque open tube outer flame oxidation flame oxygen Paris platinum platinum wire potash potassa powder present produce protoxide reac red color red heat reduced reduction flame sesquioxide silicates silver soluble Special reactions strontia sublimate substance sulphate sulphide sulphuric acid Telluric Acid tellurium tion Titanic Acid vapor violet violet color volatilized vols yellow color
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Page 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...
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