48 
THE GEOLOGIST. 
Eriophorum, Carex limosus, and several species of Sphagnum. 
All these last named plants are found not only in turf beds, 
but grow on nearly all formations. Lastly, M. Scbultz cites 
Peucedanum Ohabrsei and Alopecurus utriculatus as having ha- 
bitats on the alluvium. 
M. Mougeot denies the opinions of M. Schultz : the exam- 
ples cited by him, he states are merely exceptions, but that in 
general there is a marked difference in the vegetation of differ- 
ent formations, which proves that it depends in part on the 
nature of the soil, and in part on their physical conditions. 
M. de Caumont made several very excellent remarks as to the 
desirability of an agronomic chart of France, embracing that 
information which the joint sciences of agriculture and geology 
had brought to light. 
For our own part we must say that the whole session displays not only talent, 
but, what is as essential to the proper application of the opinions elicited, a 
system of management and conduct which it would be well to introduce into 
larger bodies in this country or elsewhere. We find the essays ranged in syste- 
matic order, the debates tending directly to the point, and hence we have a 
progression through the range of the sciences of geology, botany, and agricultiu-e, 
in their reciprocal relations. The whole is a valuable addition to a knowledge of 
the natural history of the district of Alsace. — C. M. 
