_ method of opposition proposed by P 
by Mr. Jules Regnauld. On placing the coupling wire of 
, in oppositi al. wire # 
110 : Scientific Intelligence. 
Magnus that the most different vapors are condensed upon the surfaces 
of solid bodies to such a degree that appreciable changes of temperature 
result, Hence it follows that at all times a layer of condensed vapors 
exists upon the surfaces of bodies, which becomes greater or less with the 
state of moisture of the atmosphere.—Pogg. Ann., cxxi, 174. W. G. 
6. On the influence of condensation in experiments on d inther none 
heat with almost the same facility as dry air—Pogg. Ann., cxxi, 186. 
Ww 
a porous vessel containing four hundred grams of arterial blood ; two 
other small us vases, of a capacity of sixty cubic centimetres, con- 
tained a solution of sulphate of zinc; these two vases were placed at the 
same time in the two sorts of blood. The zinc electrodes were placed in 
the solutions and did not touch the blood. As soon as the electrodes, 
which were previously attached to the galvanometer by brass wires, were 
inserted in the liquid, the current was established. The experiments 
were made on the 29th of October in presence of chemists, physicists, 
and other distinguished men of science. The blood ‘rom & 
yery old horse, in good health, which was to be slaughtered in the course 
by the deviation of the n le; it indicated, as in the first experiments 
of Mr. Scoutetten, that the positive current travelled from the arterial to 
the venous blood across the galvanometer. After having reached the 
stop, the needle oscillated and became fixed at 66 degs., where it remained 
for an hour. The galvanometer employed was Nobili’s, with a coil of 
10,000 turns. To measure the electromotive force of blood, Mr. Scou- 
saw at first that the current became reversed; and hence he concluded 
the force produced by the reaction of the two sorts of blood is com- — 
