198 Royal Society at Gottingen. 
fmalleft, the firft and the fecond, dark {pots of an atmofpherie 
nature, tranfitory and fubjected to accidental changes. They 
however fully convinced:-him, that all thefe fatellites each 
during the time of its fynodical revolution revolves around ite. 
Own axis: the cafe is the fame with the fatellites of Saturn. 
The {pots of the latter cannot indeed be feen like thofe of the 
fatellites of Jupiter; but in all the five, particularly the firft, 
fecond, third and fifth, Dr. S. faw fimilar and very diftin& 
variations of light, at a confiderable number of periods, 
which give him reafon to fuppofe the exiftence of fpots of 
the like kind. They are not regular, as in the cafe of our 
moon, but accidental variable modifications; fometimes 
fubje@t.to irregular changes, which, however, by their ufual, 
often very long, periodical duration, mark’ out certain ‘re- 
gions expofed to common atmotpheric modifications, fimilar, 
for example, to the traét of the monfoons on our earth. 
The moft important refult, however, is, that Saturn’s fatel- 
lites revolve round their axes during the time of a fynodical 
revolution ; a circumftanee which M. Lichtenberg conjec- 
tures in refpeét to all the fecondary planets. Obfervations 
tending to confirm this fuppofition will be publifhed by Dr. 
Schroter in the fecond and third part of his pe oe 
tow ot the neweft aftronomical difeoveries. 
PHYSIOLOGY. 
Profefflor Weideman at Brunfwick tranfmitted Jately ta 
the Royal Academy of Sciences a paper on the more exqui- 
fite fenfibility of certain parts of animals, from which’ the 
following is an extraét.in the author’s own words : 
*¢ Many animals have a moft exquifite fenfibility at the 
tip of the muzzle, and particularly thofe which have’ thefe 
parts long. This delicate fenfibility is principally produced 
by the end of the nervus infraorbitalis, in conjun@ion with 
fome fibres of the optical nerves, efpecially the middle 
- branches, which ren acrofs the maffeter in an oblique ‘direc- 
tion, The nervus infraorbitalis is ftrongeft 1 in thofe animals 
which 
