“ 429, Miscellaneous Intelligence. 
dise in 43 seconds; The third and last mem 2014-8 rotations in 56 
seconds. Giving to each observation the same weight, we have 
1822 vibrations of the sonorous flame per second. 
The cant applied to the same problem, > gave 177-7 vibrations 
ided, 
ein iecencosling red aki = with those of a set of excellent 
tuning forks made by Ritchie of Boston, was near 
48° aa in extent. This bein the light of the sen a at 
endured conspicuously at each plllantibn, 0500366 or x45 of asec ond. 
It was noticed too that each are varied in brightness, the esi 
maximum ‘temin ation being, not at the center of the arc, but 
beyond it; so that it would appear that in each luminous interv 
the flame lost its light more rapidly than it acquired it. 
T have spoken of the luminous arcs as though they were abso- . 
lutely detached from each _ So they appear to a careless 
observer. A close scrutiny, however, revealed an extremely faint 
oot fading thread of bluish light uniting them. Hence, in this 
se at least, we cannot accept Dr. Tyndall’s Sue errs that ¢ there 
oy = absolute bea some arama of the 
ment . Smith’s paper ; er the author. —1 have 
applied the ecives ilvered pall to the —— of the ssagneniat 
problems. (1.) Yo adjust two sounding flames to exact unison, or to 
test the perfection of accord between nti giaecsaits unisonant 
“The revolving ball singe to the two flames, gives two inter- 
secting which, in case <i — —— are eq 
in number, an ene "identically the s tions, sta- 
an g the variable sated "of the ba. 
(2.) To determine the exact, or the approximate, value of the musical 
ges (luminous 
ares), the relative number of these images will express the interval 
| required. Thus for one pair of flames, I found the interval to be 
2:1; for another ob eres 
7 mati when 
7 resting wit ease pad Ss kalei 
might be used forte ane purposes, though with some inconven- 
