PHENOMENA OF SUCTION. 



315 



If the end of a tube is placed opposite to that portion 

 of a gaseous jet, the air flows to it through the tube, 

 nnd even heavier particles may be carried onwards by 

 the jet. 



If the wide end of a bent tube, fig. 205, is dipped 

 in water, and air is blown through the straight tube, 

 the liquid rises in the tube until it reaches its mouth, 

 and is there carried away and dissipated by the air 

 current, the drops forming a conical spray. 



A glass tube, 9 or 10 cm long, 2 or 3 mm wide, is pulled out in the 

 middle, cut, and one portion bent so as to form an obtuse angle. 

 .Both are then passed through suitable holes in a cork, so that the 



FIG. 205. 



ooint of the bent tube is a little in front of the end of the straight 

 piece, as shown in fig. 205. If the apparatus does not act well at 

 irst, pull the tubes in and out until the position is found in which 

 act best. 



If a strong current of air is blown by means of a 

 ass tube, a few centimetres long and 6 or 8 mm wide, 



