Chemical lecture experiments . ll bottle. A piece ofround cotton wick is drawn through the glass tube, and the 336 CHEMICAL LECTURE EXPERIMENTS bottle is one-half filled with turpentine. On lighting the free end of the wick, a small smoky flame will be 12 cm. length of combustion-tubing isso clamped that it serves as a chimneyto deflect the products of combustion intothe lower part of a Bunsen flame. Thecolumn of soot rising through the com-bustion-tube enters the Bunsen flame andthere becomes heated to incandescence. The products of the incomplete com-bustion of a candle may be con
Chemical lecture experiments . ll bottle. A piece ofround cotton wick is drawn through the glass tube, and the 336 CHEMICAL LECTURE EXPERIMENTS bottle is one-half filled with turpentine. On lighting the free end of the wick, a small smoky flame will be 12 cm. length of combustion-tubing isso clamped that it serves as a chimneyto deflect the products of combustion intothe lower part of a Bunsen flame. Thecolumn of soot rising through the com-bustion-tube enters the Bunsen flame andthere becomes heated to incandescence. The products of the incomplete com-bustion of a candle may be conductedinto the base of a Bunsen burner bymeans of a glass elbow thrust into oneof the air-holes (Fig. 139). On lightingthe Bunsen burner, sufficient draft willbe obtained to conduct the products ofcombustion of a burning candle, the tipof whose wick is thrust into the lower end of the glass elbow, up into the Bunsen flame. The flame is rendered luminous. Turpentine lamp; 12 cm. length of combustion-tubing; glass elbow ; Fig. 139 11. Carburetting a flame of hydrogen. —The introductionof solid particles of carbon into a non-luminous flame maybe effected by introducing vapors of carbon compoundswhich are decomposed readily by heat, liberating finelydivided carbon. A current of hydrogen is conducted through a test-tubecontaining some cotton-batting and fitted with a three-holedcork (Fig 140). In one hole is a glass elbow, extending tothe bottom of the test-tube, through which the hydrogenenters. The hydrogen issues through a bent glass tubeserving as a jet in another hole. A small dropping-funnel STRUCTURE OF FLAME 337
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectchemist, bookyear1901
