274 Scientific Intelligence. 
has most judiciously confined himself as much as possible to general 
sone and to the statement of numerical results. English treatises 
hysics of late have done little else sot re-echo the opinions of the 
Recteibns Faraday upon this branch of scie and we owe this Ger- 
man physicist no inconsiderable debt of gratitude for his faithful expo- 
sition and dispassionate criticism of the labors of other expe 
The results of Prof. Riess’s own labors form no inconsiderable or un- 
important part of his work, and we find here reproduced his Bs 
on the torsion electrometer, on the development of heat in the connect 
ing wire of the electric battery, on induced electrical currents, and 
upon many other interesting subjects. No treatise which has yet been 
published upon frictional Meditisive, at all compares with this in real 
extent, fullness and completeness, and it is no small part of its — 
that it has been drawn wholly from the original sources, and has not 
been built up upon some other and older work as a smewrrness “Such 
works as this are needed in every branch of science; they demand 
for their production the ath insight, the most dispassionate judg- 
ment, and the most thoro and comprehensive knowledge. We 
a’ bint that Prof. ‘Bless’ noble trealise may not long — 
alone 
possible to maintain a perfect gas at so low a temperature, the pressure 
would be null. 
no a is entirely devoid of cohesion, the immediate results of 
Exberinent me only approximations to the position of this absolute 
ro, € approximate positions approach nearer to the true posi- 
tion as hy si is rarified. 
The author having deduced the true position of the absolute zero 
from M. Regnault’s experiments on atmospheric air and carbonic acid, 
soon after at publication, announced the result in the Edinburg 
New Philosophical Journal for July, ites and in the Transactions of 
the Royal Society of Edinburgh, vol. 
The present paper gives the details “of the method of dele 
which he adopted, and a copy of the diagram which he u 
The following were the results arrive dat: 
The absolute zero of the perfect gas thermometer is 
274°°6 Stang sao hans 
494°-28 Fahrenhei } below the temperature of melting ! 
cient of oc, of a perfect gas, in fractions of its vole 
ume at the temperature of melting ice, is consequently ,— 
Per degree of the Centigrade scale, 0-00364166. 
1 — 
2746. 
1 
og: 314. 
re aed 0:00202 
6. Aridium ; by Campzett Morrir and James C. Boots, (Commu 
nicated for this Journal.) —Bahr (Jour. Prakt. Chem., ts, tr having a 
Per degree of Fahrenheit’s scale, 
