i386 Influence of sounds on Animals. 
jected many chronomefters to 20a Sait from half an 
of mercury to 75 inches ; and in all cases has found, 
that in all instances if a time-keeper gained by increasing the 
porert ad it lost by ater. it,.and vice versa. A difference 
ensity denoted by an inch of quicksilver, is sufficient to 
dredaee 3 in many chlesmiuaaate a visible alteration of rate. 
Mr. H. has drawn from it several important conclusions: 
for instance, that a chronometer constructed in London, 
nearly on the level of the sea, would undergo an alteration 
of rate, from difference of atmospheric pressure alone, if 
transported to Geneva, to Madrid, to Mexico. or any other 
plate, situated much above the level of ‘the place where:it i is 
con 
The whole of the results are about to be laid — the 
Royal Society. Lond. Phil. Mag. Fol. 63, p. 311 
38; Sovdawalite; ‘a new mineral.—This name has been 
given by M. G. Nordenskiold, Esq. to a mineral from Sor- 
dawala in Finland 
The mineral is somewhat like coal in appearance. It oc- 
curs massive and without any traces of cleavage. The i 
lour is greenish, or grayish black It is.as hard as glass. 
occurs in a thin bed, and breaks readily in a direction x 
right angles to the direction of the bed. The fracture is 
conchoidal ; and the lustre vitreous, inclining to semi-metal- 
lic “Opaque. Brittle. Spec. grav. ics It becomes red- 
dish on long exposure to the atmosphere 
Its chemical composition is found to be as follows : 
Cd _ 49.40 Magnesia 10.67 
- Alumine, 13.80 Phosphor acid, 2.68 
Peroxide of Iron, 18.17 Wate 4.38 . 
99.10 
24. Infinence a sounds on the Elephant and Lion. —In the 
human ear the fibres of the circular.tympanum radiate from 
its centre to its se and are of equal length, but 
Sir, Home has found that in the. elephant where the t 
os is oval they are of different lengths, like the radii yee om 
he focus of an ellipse. He considers that the human ear 
i adapted for musical sounds by the equality of the radii, and 
he is of opinion that the long fibres in the tympanum of the el- 
