A popular chemistry; . 82 INORGANIC CHEMISTRY. Exa. The Oxy-hydrogen Blotv-pipe. Calcium Light, and with a properly arranged re-flector has been seen at a distance of one hundredand eight miles. COMBUSTION 83 Pig. 40. Mouth Blow-pipe.—In the common blow-pipe, used by jewelers and mineralogists, a current of air from the mouth * is thrown across the light just above the wick. The flame loses its brilliancy and is driven one side in the form of a cone (Fig. 41). Its size, also, is less, and since the combustion is concentrated into a smaller space, its temperature is higher than that of an
A popular chemistry; . 82 INORGANIC CHEMISTRY. Exa. The Oxy-hydrogen Blotv-pipe. Calcium Light, and with a properly arranged re-flector has been seen at a distance of one hundredand eight miles. COMBUSTION 83 Pig. 40. Mouth Blow-pipe.—In the common blow-pipe, used by jewelers and mineralogists, a current of air from the mouth * is thrown across the light just above the wick. The flame loses its brilliancy and is driven one side in the form of a cone (Fig. 41). Its size, also, is less, and since the combustion is concentrated into a smaller space, its temperature is higher than that of an ordinary flame. The hottest point is. at 6, a little beyond the tip of the inner blue cone, because at this place the combustion is most complete. The inner cone contains CO in excess, hot and ready to combine with 0 from any substance exposed to it, and is therefore called the reducing flame. The outer envelope contains the 0 in excess, borneFlG- 41- forward by the jet of flame, highly heatedby it, and ready tounite with a metallicbody. It is theref
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Keywords: ., bookcentury1800, bookdecade18, booksubjectchemistry, bookyear1887
