254 



THE SIPHON. 



out at &, but the surface of the liquid at a is not 

 raised thereby: it descends and remains at the same 

 height as that at b. Such a siphon (usually called 

 a 'Wiirtemberg siphon') may therefore be kept 

 filled ready for use ; if one end is dipped into the liquid 

 the latter will immediately run out at the other end. 



The siphon being usually filled by dipping one enc 

 into the liquid and sucking at the other, another form 

 of it, represented in fig. 174 J., is used for liquids 



FIG. 174 (I real size}. 



the presence of which in the mouth would be objection,! 

 able. The end a is dipped into the liquid, the end i\ 

 is closed by the finger, and the siphon is filled b] 

 sucking at c ; when both branches, a d and b d, art 

 full, the finger is withdrawn and the liquid runs out at b 

 An enlargement e renders the passage of any liquic 

 into the mouth still more difficult. 



