t first very visible.

The rising column, which is nearly cylindrical, breaks up into drops
before or during its subsequent descent into the liquid. As it
disappears below the surface the outward and downward flow causes a
hollow to be again formed, up the sides of which an annulus of milk is
carried, while the remainder descends to be torn again a second time
into a vortex ring, which, however, is liable to disturbance from the
falling in of the drops which once formed the upper part of the
rebounding column.

It is not difficult to recognize some features of this splash without
any apparatus beyond a cup of tea and a spoonful of milk. Any drinker of
afternoon tea, after the tea is poured out and before the milk is put
in, may let the milk fall into it drop by drop from one or two inches
above it. The rebounding column will be seen to consist almost entirely
of milk, and to break up into drops in the manner described, while the
vortex ring, whose core is of milk, may be seen to shoot down into the
liquid. But this is better observed by dropping ink into a tumbler of
clear water.

Let us now increase the height of fall to 17 inches. Series III.
exhibits the result. All the characteristics of the last splash are
more strongly marked. In Fig. 1 we have caught sight of the little
raised rim of the hollow before it was headed, but in Fig. 2 special
channels of easiest flow have been already determined. The number of
ribs and rays in this basket-shaped hollow seemed to vary a good deal
with different drops, as also did the number of arms and lobes seen in
later figures, in a somewhat puzzling manner, and I made no attempt to
select drawings which are in agreement in this respect. It will be
understood that these rays contain little or none of the liquid of the
drop, which remains collected together in the middle. Drops from these
rays or from the larger arms and lobes of subsequent figures are often
thrown off high into the air. In Figs. 3 and 4 the drop is clean gone
below the surface of the hollow, which is now deeper and larger than
before. The beautiful beaded annular edge then subsides, and in Fig. 5
we see the drop again, and in Fig. 6 it begins to emerge. But although
the drop has fallen from a greater height than in the previous splash,
the energy of the impact, instead of being expended in raising the same
amount of liquid to a greater height, is now spent in lifting a much
thicker adherent column to about the sa