eae 
: 
: 
E. J. Pictet on the Diluvian Period. 345 
Analogous to this is the observation of Brewster.* Speaking 
of uniting similar pictures, (patterns on hangi 
ulor vision, he remarks :—“ The 
object seen through another 
In closing I will remark that while many of the experiments 
above mentioned are easily repeated, others require considerable 
practice in this kind of observation. 
Art. XXXI.—The Quaternian or Diluvian Period, considered 
tn its relation to the present Hpoch ; by F. J. Picrer. 
| From the Bibliothéque Universelle ( Archives) de Genéve, vol, viii, p. 255.] 
I soon perceived that the zoologic population had not in reality 
been modified in passing from one to the other, and that they are 
Scipio Gras,t who is engaged in an importar 
dilayium of mee valleys of the Rhone and the Rhine, and also Mr. 
Lartet,§ who has recently sustained the same opinion in a memoir 
upon the geological antiquity of the human race m western 
Kurope. 
There are however some opponents to these views, especially 
Mr. Koechlin Schlumberger,|| who replying to Mr. Scipio ? 
has called my opinion a little radical and has sought to overthrow 
* The Stereoscope, p. 91, London, 1856. ition, tome 
+ Trait eneiscied paléontologie, note B, Ist edition, tome i, p. vin 
} Bulletin de la Société géologique de France, 2d Series, tome xv, p. 167. 
j Bibl. Univ. (Archives), tome viii, p. 193. July, 1860. i, p. 88. N 
a's letin de la Société géologique de France, 20 Series, tome xvi, p- 98. Now 
yiesg, 
