1 10 EXPERIMENTS MADE ON SHEEP WITH THE INSECT, &C. 
light, becomes covered with a multitude of aerial bubbles, as do 
the leaves of vegetables under certain circumstances. 
ButM. De Blainville has remarked that we must not confound 
the gases of the skin with the matter of perspiration reduced to 
the state of vapour by the heat either of the body or of the at- 
mosphere. Neither must we confound them with the atmo- 
spheric air, of which a thin layer reposes upon, adherent to, the 
surface of the skin, disengaging itself in the form of bubbles 
whenever the body is plunged into water. 
However it may be, gases exhaled from the skin are never 
retained upon its surface, like those of the intestines. We 
have no means of obtaining them, save through artificial means. 
Journal de Midecine V tier inair e de Lyon . 
EXPERIMENTS MADE ON SHEEP WITH THE INSECT, 
THE ICHOR, THE SCURF AND BLOOD OF 
SHEEP AFFECTED WITH THE SCAB. 
By Herhwig. 
[Continued from vol. xxiii, page 638.] 
Experiment No. 6 ( the second repetition of the former 
Experiment.) 
On the 1st of December, 1827, the sheep marked No. 7 
(and which had been already employed for another experiment, 
but now in a perfectly healthy state), was inoculated in the 
middle of the back in the following manner : To the extent of 
the palm of the hand the wool was clean cut off ; then the skin 
was moderately rubbed for eight minutes, and then some matter 
was smeared over it, taken fresh from a very scabby sheep, 
and gently rubbed in. — 2d day. The spot shewed a dark red 
appearance, warmer and somewhat moister than the surrounding 
skin. No insects could be seen in the matter. — 3d day. The 
skin somewhat more red and warm, covered with a very thin, 
soft, yellow scurf. — 4th day. The same. — 5th day. There is 
still the same scurf. — 6th to 9th day. The same ; the thin scab, 
however, is falling off, and the skin below appears quite sound. 
— 10th to 13th day. There is no kind of disease to be seen in 
the part inoculated, and on observing further the anitnal up to 
17th of February, 1828, and for seventy-nine days afterwards, 
there was not the slightest appearance of the scab observed, so 
that it cannot be said in this instance any effect was produced 
by the experiment. 
