cxvir. 



FIG. 325. Blowpip flame, o. reducing, 6, oxidizing part of the flame. 



FIG. 326. Piece of glass drawn out to form a pipette. 



FIG. 327. A tube drawn out in order to seal it. The operation is completed by directing the poii.t of a blowpipe 

 ame on the point a, and drawing the two ends of the tube rabidly apart. 



FIG. 328. Solution. The beaker is supported on wire gauze in order to prevent it from cracking. 



FIG. 329. Apparatus for preventing loss by evaiwratioii during prolonged ebullition. K, tin- flask in which 

 the liquid is l*>iled ; F. .1 Liebig's condenser; /, a glass tube, which connects E and F; t ami t, two india-rubber 

 tubes, which convey a stream of water to and from the condenser. The vapour from F. is condensed in F, and 

 runs back into K. Any of the condensed liquid that passe* beyond the bend of the glass tube I), which is connected 

 to the upper end of K, is collected in the small vessel below, D, passes to the bottom of the vessel, and aa soon 

 as any quantity of liquid accumulates in it, the flame may be removed from uuder E ; a vacuum then 

 forms in E, and the liquid rushes back into it. 



