The basin is funnel shaped, the aperture being 
near the center; the sides slope regularly down 
to the bottom or tube opening which is perhaps 
5 feet below the surface. The tube seems nearly 
circular, is 12 inches or more in diameter; the walls 
as they descend being somewhat irregular. When at 
rest the water stands within about one foot below 
the top of the beaded surface and touches the under 
side of the beaded logs of the frame work, ,!.Jbove 
this level the silica covers everything. Belov; 
the basin is lined with a whitish, irregular 
coating, without beading (this is proof that the 
water never falls below this level). The water 
is almost perfectly clear, looking a little blue 
in the deeper part of the basin, end quivers or 
pulsates slightly for the ten minutes following 
an eruption. This quivering motion is presently 
changed to a boiling condition by small bubbles 
of s team rising through the water. For two or 
three minutes the boiling continues, growing gradually 
more pronounced, the water meantime rising two to 
three inches in the basin, where suddenly great 
bubbles rise and throw^ a heavy body of water into 
the air. This is followed quickly by others until 
the waters of the pool are in a violent state of 
agitation, the broken masses of water being thrown 
