646 
The Mvrchland Milling Machine. 
pipe above, but without the stop-cock ; and, opposite to it, on the othe 
side, are four connections of the same sort (b, figs. 3 and 4). The singl 
one a, is for the purpose of attaching the elastic tuhe to the pail, ai d 
so connecting the latter with the overhead pipe j and the other four 
are for shorter lengths of tubing (y, fig. 1), connected in tit- r 
