Am\p?!ir  190?™' }        Compressed  Air  W 'ash-Bottle.  175 
of  the  T  piece  C,  is  connected  with  A  by  means  of  a  piece  of  rubber 
tubing,  E.  To  the  end  of  the  tube  B,  which  passes  through  the  T 
piece  C,  is  attached  any  desired  length  of  narrow  rubber  tubing ;  two 
E 
Compressed  air  wash-bottle 
feet  is  a  convenient  length,  although  any  length  may  be  used.  A 
glass  jet,  F,  is  attached  to  the  end  of  the  tubing.  A  piece  of  rubber 
tubing  about  twice  the  diameter  of  the  narrow  tubing  is  passed  over 
the  latter  and  attached  to  the  T  piece  C,  at  G.    The  other  end  is 
