- 
222 . Scventifie Intelligence. 
takes effect upon the death of the parts. When crushed, or the cells 
in ne way destroyed as to vitality, they turn blue immediately. 
N xpo t 
III. Astronomy. 
Scintillation of the Stars.—Prof. L. Respraut has published 
an extended and very interesting paper upon this subject, it being 
an extract from the proceedings of the Accademia Pontificia de 
uovi Lincei, at the session held Febr. 14, 1869. It gives the 
results of a great number of observations made with the spectro- 
a 
the like. The first portion of the paper is a reswmé of an earlier 
one giving the results of a series of observations made previously 
to May 1868. The conclusions arrived at, although incomplete, 
were ‘so important, that Prof. Respighi made a more extend 
series of over 700 observations, which were continued from October, 
1868, to February, 1869. The corey eee employed was an equa 
torial by Merz, with an aperture of 44 inches, and provided with 
a oe th prism i Hoffmann, with a oplindvioal lens betweeD 
the prism and ed e 0¢ 
other, passing from the violet to the red, when the a. — in the 
east, and in the opposite direction when it was in the 
characteristic phenomena, as summed up by Prof. Respight are a8 
(1.) In normal atmospheric tee the motion of the bands #8 
from the red to the violet for stars in the west, and from the 
violet to the red for stars in the oon 
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(3.) The motion of the bands is more piesa and less rapid nea! 
ra r 
4 ) When the instrument is so placed that the spectrum is vertl 
eal, es motion of the bands is the same as when it is horizontal 
but th nds are less definite, and nearly transversal, up . 
altitude of “a | while - eater ee they become sncee 
imes fits mere movi ing masses either bright or obscure; 
not rarely resulting in mere changes of poe genes : 
ie ome bright bands are more rare and less regular than the 
occur only near the horizon. 
