1. The drop size depends upon tlie geometric relation be- 
tween the solid and liquid. If the solid be spherical, the larg- 
est drops fall from the largest spheres. Absolute dilference in 
radii takes a greater effect upon the drops formed from smaller 
than upon those from larger spheres. Of circular horizontal 
plates, within certain limits the size of the drop varies directly 
with the size of the plates. 
5. The drop size depends upon the chemical nature of the 
solid from which the drop falls ; and little or nothing upon its 
density. Of all the solids examined Antimony delivers the 
smallest and Tin the largest drops. 
6. The drop size depends upon temperature. Generally, 
the higher the temperature, the smaller the drop. With 
water the effect of temperature for a difference of 20° C. is 
very small. 
7 . The nature of the gaseous medium has little or no effect 
on the drop size. 
SLL. 
8. 'l'lie drop-size of a liquid which drops under like condi- 
tions through various media, does not depend wholly upon the 
density of the medium, and consequent variation in the weight, 
in the medium of the dropping liquid. 
9. If there be two liquids A and B which drop under like 
conditions through air ; and the drop size of the one A be 
greater than that of the other B ; then if a third liquid C be 
made to drop through A and through B, the drop-size of C 
through A is greater than the drop size of C through B. 
10. If the drop size of A through B be greater than the 
drop size of A through C, then the drop size of D through B 
is also greater than the drop size of D through C. 
11. If a liquid A drop upon like conditions in succession 
through two liquids B and C then its drop size through any 
mixture of B and C is intermediate between its drop size 
through B and its drop size through C, and the greater the 
proportion of ^ in the mixture the more nearly does the 
