E. W. Morley—Apparatus for Rapid Filtration. 215 
After fitting the platinum cone and filter in the funnel (a), a 
second funnel (b) of the same diameter, with a rather wide neck, 
is inverted over the first. A strip of thin vulcanized rubber 
eaker (g) containing the liquid to be filtered is placed upon a 
support whose height admits of easy adjustment, so that the 
the arrangement of the apparatus, and have left it to itself, to 
req 
tate shall have passed over. " ae 
If the precipitate is to be washed by decantation, the liquid 
from which the precipitate has settled is removed in the same 
way. When the precipitate is 7 to be transferred to the 
filter, the beaker is raised so that t 
bottom of the precipitate. The precipitate then passes over, 
and may be completely removed from the beaker by the use 
the syphon. During this process, the action of the syphon 
may be hastened by closing the air passage (at h) by pressure, 
and may well be suspended at times by loosening the joint (/) 
at the neck of the upper funnel, so as to prevent particles of 
liquid holding precipitate in suspension from being thrown 
upon the sides of the funnel. If the bulk of the transferred 
precipitate is not too large, its washing may DOW 
