This scheme is verified by the experimental results obtain- 
ed. Of all liquid^ water forms the largest drops in falling 
through air because in it, the stubborn cohesion prevails to 
the greatest degree over the joint action of persistent cohesion 
and weight. In water mercury forms drops greater than in 
all other liquids because in water (as a medium) stubborn 
cohesion and weight prevail to the greatest degree over per- 
sistent cohesion. 
The case SLL may be inverted if the drop forming liquid 
be specifically lighter than the medium liquid. Thus every 
case of SLL which we have examined in which a liquid A 
drops downwards through a liquid 13, has a countercase in 
which the liquid B* drops upwards through the liquid A. 
In order to measure the size of such ascending drops, the 
stalagmometer fig. VII is modified in form. It is not found 
possible to cause the dropping liquid to adhere with sufficient 
completeness and uniformity to a solid sphere immersed in 
the denser medium in the cases experimented on. The end 
of the syphon A was turned upwards and served as the solid 
whence the liquid dropped without the interposition of a 
sphere or other solid. The measuring tube D was removed 
from the neck of the cup C a stopper being inserted in its place. 
The cup C was filled with water and the measuring tube I) 
being also filled with water was inverted into it and held by 
the holder H. 
The modified stalagmometer is seen in fig. X. Care was 
taken that the end of the syphon A should always be at the 
same depth beneath the surface of the water in C. 
The drop-sizes of the liquids of table XYII were first exa- 
mined by this stalagmometer. 
The following Table XVIII shows the number of drops of 
the various liquids dropping through water required to 
fill the measuring tube up to the given mark. The mea- 
suring tube here employed was different from that used in 
* «.'ea bitfoduchou. 
