318 
W BT 
o 
86.2 
W B “ 
177.5 
— 
— 

= 
2.059 
Wet 
86.2 
W b 
163 
— 
1.890 
Wb t 
o 
86.2 
W B 
86.2 
— 
— 
— 
— 
1.000 
Wb 
86.2 
ly, on 
comparing these figures 
with those of Table 
XXI, we get the remarkable law which it would be difficult 
to express in words, that 
W B T w W B BT 2 
W B BT W W B B 2 T w 
w 
Wt Bw W B t Bw Wet B w W b t B w 
2 2 
— 1 nearly. 
The main results obtained with regard to drops may be 
collected into the following laws : 
1. The drop-size depends upon the rate of dropping. Ge- 
nerally, the quicker the succession of the drops, the greater 
is the drop. The slower the rate the more strictly is this the 
case. This law depends upon the difference, at different 
rates of the thickness of the film from which the drop falls. 
2. The drop size depends upon the nature and quantity of 
the solid which the droppiug liquid holds in solution. If the 
liquid stands in uo chemical relation to the solid, m general 
the drop size diminishes as the quantity of solid cont ained in the 
liquid increases. The cause of this seems to be thatthe stubborn 
cohesion of the liquid is diminished by the solution of the solid. 
Where one or more combinations betweeu the liquid and solid 
are possible the drop size depends upon indeterminate data. 
3. The drop size depends upon the chemical nature of the 
dropping liquid, and little or nothing upon its density. Of all 
liquids examined water has the greatest and acetic hydrate 
the least drops. 
