|W. B. Rogers on Rotating Rings of Air and Liquids. . o51 : ; or 
series of short projections curving steeply downwards, like the 
_ lowest and least developed volutes in the preceeding experi- 
ment. 
_ On examining these lateral gyrations as shown in the figure 
it will be seen that each is formed at the expense of the adjacent 
_ parts of the column both above 4 
and below it. The central arrows 3 
ointing divergingly upward in- 
dicate the direction in which the 
_ Inner portions of the stream are 
deflected to unite with the wider 
he 
streams of gaseous — 
ge! movement 
the agencies 
ey at least 
: TL. of the motions of the et sere Hs = ee oe ae 
ae th stifal rings developed by the explosive combustion 
of eRicphenust ites gas are formed under the influence of — 
far more energetic forces than are brought into play by the ru 
