352 H. W. Wiley— Automatic Filtering Apparatus. 
This rod is connected by rubber with the lever, 6, which is 
worked by the armature, d; e and / are two insulated copper 
wires connected with a small Grove, Bunsen or Daniel’s cell ; 
e passes through the magnet, f comes directly from the cell, and 
both at g are fastened into a small glass tube, the free ends 
denuded of their covering projecting three or four millimeters 
elow. 
wire. This wire is fastened to the long arm of the lever, m, the 
elevated, and the liquid in A flows into B until the bob 1s 
raised to its first position. This breaks the circuit, the rod, 4, 
falls, the _— of the liquid from A to Bis — After 
il eve 
oC 
(=) 
at s, and with the wash bottle, using a as a rubber, any pre 
Advantages of the Apparatus. 
Washing by decantation.—The whole of the supernatant liquid 
can be poured at once into A. The beaker is refilled with the 
