328 fi. Bunsen on the Washing of Precipitates. 
such a manner that each separate piece of the apparatus is 
held by a single fastening only, in order to prevent the tubes 
being strained and broken by the possible warping of the 
board. On releasing the pinchcock a, water flows from the 
conduit 7 down the tube ¢ toa depth of more than 30 feet, 
temperature possessed by the stream.* ‘The tension exerted 
ter the precipitate has been entirely transferred, the filtrate 
passes through drop by drop, and the manometer not unire- 
quently now shows a pressure of an extra atmosphere. The fil 
first traces of this breaki | i the prect 
‘ his | ng up become evident 3 
pitate will be found to have been so firmly pressed upon the 
* The time required to obtain the above of exhaustion in a flask nt 
from 1 to 3 liters capacity ranges from s Al ntity of water 
4 ' Tange: te: - the quantity 
Rpcossapy amounts to about 40 or 50 liters, wlgantoeg ses 
