No. 15 shows the column at its greatest height, and it should be noticed that Figs. 16 and 17 show a tendency on the part of the head of this column to split off as a separate drop.
SERIES I—(continued)
| 14 0·103 sec. |
| 15 0·116 sec. |
| 16 0·129 sec. |
The column in subsiding forms a "cake" of liquid round the base. The edge of this circular cake (see Figs. 17, 18, and 19) is the first well-marked ripple spreading outwards in an ever-widening circle.
SERIES I—(continued)
| 17 0·153 sec. |