ICR et Ewer kere a: ©. Ae gtee, ten ae eee te ee eee ay 
narrowly observed by this form of experimen 
EKzp. 3 j 
xp. 3.— 
ished circular metallic plate, considerably wider than the jet, and 
ten in in di 
curved sheet of water, in the interrupted light, both with 
without the aid of the neighboring so ; ; 
Experiments with like results were made with oblique and 
all 
vertically ascending jets. In cases the intermittent light 
am 
reference to gaseous jets, allusion will at present be made only 
to sonorous flames in tubes. 
2. Kesolution of the Sounding flame; by Prof. F. H. Sarru, 
(ib.)—By those who have no mirro lenses Pp 
three feet long, and it was found possible to secure such a speed as to 
light, and the disc 
silvered ball should 
