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 iv
... Bead , ( ( in Microcosmic Salt , Table I. - Colors of Beads of Borax and Microcosmic Salt , Table II . - Behavior of Metallic Oxydes with Borax and Microcosmic Salt , • Examinations with Carbonate of Soda , 85 103 PART III . Special ...
... Bead , ( ( in Microcosmic Salt , Table I. - Colors of Beads of Borax and Microcosmic Salt , Table II . - Behavior of Metallic Oxydes with Borax and Microcosmic Salt , • Examinations with Carbonate of Soda , 85 103 PART III . Special ...
Page 19
... bead changes to a brown , which , finally , after a little longer blowing , becomes quite dark , and loses its transparency . The cause of this is , that the molybdenic acid is very easily reduced to a lower degree of oxidation , or to ...
... bead changes to a brown , which , finally , after a little longer blowing , becomes quite dark , and loses its transparency . The cause of this is , that the molybdenic acid is very easily reduced to a lower degree of oxidation , or to ...
Page 26
... bead . This bead hanging in the hook , must be clear and colorless . Should there not adhere a sufficient quantity of the flux in the first trial to form a bead sufficiently large , the hook must be dipped a second time in the flux and ...
... bead . This bead hanging in the hook , must be clear and colorless . Should there not adhere a sufficient quantity of the flux in the first trial to form a bead sufficiently large , the hook must be dipped a second time in the flux and ...
Page 38
... bead , in its highest state of oxi- dation , shall be visible , as for instance , manganese dissolved in the microcosmic salt . 7. Biborate of soda , borax- ( NaO + 2BO3 ) .- Commercial borax is seldom pure enough for a reagent . A ...
... bead , in its highest state of oxi- dation , shall be visible , as for instance , manganese dissolved in the microcosmic salt . 7. Biborate of soda , borax- ( NaO + 2BO3 ) .- Commercial borax is seldom pure enough for a reagent . A ...
Page 39
... bead or not , and whether the bead remains transparent after cooling . The beads of some substances , for instance those of the alkaline earths , are clear while hot ; but upon cooling , are milk - white and enamelled . Some substances ...
... bead or not , and whether the bead remains transparent after cooling . The beads of some substances , for instance those of the alkaline earths , are clear while hot ; but upon cooling , are milk - white and enamelled . Some substances ...
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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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