— 170 
ject of determining how far the rapidity of dropping influen- 
ced the size of the drops and to establish the uniformity of 
the size of the drops which drop at equal intervals of time. 
In these experiments cocoa nut oil was taken as the liquid, 
an ivory sphere as the solid, and atmospheric air as the gas. 
The ivory sphere was washed in hydrochloric acid so as to 
deaden its surface Immediately before, and after each batch 
of drops, the same number of drops was counted and their 
time of falling compared with the time which elapsed in the 
actual experiment. In no case however, was there a differ- 
ence between the two of a single second, so that gt. may be 
considered in each case to be precisely given. 
TABLE I. 
T = 28°. 5 C. — Bate = 60 drops in 60” 
Number of Drops. 
gt. 
W eight of Drops. 
Gramme. 
60 
1” 
3.9817 
60 
1 
3.9841 
60 
1 
3.9781 
60 
3.9807 
60 
1 
3.9742 
60 
1 
3.9730 
60 
1 
3.9735 
60 
1 
3.9682 
gt. 
Mean weight of single 
drop 
1 
0.066279 
