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 19
... clear yellowish glass is formed ; but as soon as the reduction flame reaches it , or the point of the blue cone touches it , the color of the bead changes to a brown , which , finally , after a little longer blowing , becomes quite dark ...
... clear yellowish glass is formed ; but as soon as the reduction flame reaches it , or the point of the blue cone touches it , the color of the bead changes to a brown , which , finally , after a little longer blowing , becomes quite dark ...
Page 26
... clear of dirt , and ready for use , they should be kept in a glass of water . To use them , we dip the wetted hooked ... bead . This bead hanging in the hook , must be clear and colorless . Should there not adhere a sufficient quantity ...
... clear of dirt , and ready for use , they should be kept in a glass of water . To use them , we dip the wetted hooked ... bead . This bead hanging in the hook , must be clear and colorless . Should there not adhere a sufficient quantity ...
Page 37
... clear , and a sample taken up with an iron spatula appears perfectly white ... glass , which is to be placed in cold water , and stir while the solution is cooling . The greater part of the salt ... bead , ITS USE . 37 Nitrate of Potassa,
... clear , and a sample taken up with an iron spatula appears perfectly white ... glass , which is to be placed in cold water , and stir while the solution is cooling . The greater part of the salt ... bead , ITS USE . 37 Nitrate of Potassa,
Page 38
... clear upon the addition of nitrate of silver , or nitrate of baryta . Or a ... bead . Borax acts either as a flux , or through the formation of double ... bead , which adheres to the hook . This should be then dipped into the powdered ...
... clear upon the addition of nitrate of silver , or nitrate of baryta . Or a ... bead . Borax acts either as a flux , or through the formation of double ... bead , which adheres to the hook . This should be then dipped into the powdered ...
Page 39
... clear 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 ...
... clear 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 ...
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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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