THE 
LONDON, EDINBURGH anv DUBLIN 
PHILOSOPHICAL MAGAZINE 
AND 
JOURNAL OF SCIENCE. 
[FOURTH SERIES.} 
SUEY tear. 
I. Experimental and Theoretical Researches on the Figures of 
Equilibrium of a Liquid Mass withdrawn from the Action of 
Gravity.—Third Series. By J, Prareau*. 
Theory of the modifications experienced by jets of Liquid issuing 
from circular orifices when exposed ta the influence of vibratory 
motions. 
$l. p the preceding series +, we deduced from the properties 
of our liquid figures the theoretical explanation of the 
constitution of jets of liquid issuing from circular orifices, and 
protected from every disturbing influence ; we have now to study, 
again from a theoretical point of view, the curious phenomena 
which present themselves when vibratory movements are com- 
municated to the liquid. Setting out, according to our an- 
nouncement, from an idea of Savart’s, we shall show how the 
effects of these vibratory motions combine with those of the 
forces of figure (forces figuratrices) which determine the trans- 
formation into detached masses, after which all the phenomena 
in question will explain themselves in a natural manner, 
After having endeavoured to prove, by means of an ingenious 
hypothesis, that the agitation occasioned in the mass of liquid in 
the vessel by the efilux itself is capable of exciting vibrations in 
this mass directed normally to the plane of the orifice, Savart 
has shown that the result of such vibrations would be the 
* From the thirtieth volume of the Memoirs of the Royal Academy of 
Belgium. 
+ Mémoires de Vv Académie Royale de Belgique, yol. xxiii. ‘Taylor’s 
Scientific Memoirs, vol. v. p. 584. 
Phil. Mag, 8, 4. Vol, 14, No, 90, July 1857. B 
