( 91 ) 
VIII. — On the Geognosy of Germany, with Ob- 
servations on the Igneous Origin of Trap. 
By Amie Bouf/, M. D. M. W. S. 
In a Letter to Professor JxVMESon. 
(Read ^6th January and dth February 
My DEAR Sin, 
I HAD long cherished, as you already know, a desire of 
visiting Germany, that country of true Geology, for the 
purpose of viewing there the classical points, of retracing 
the observations already made, and of becoming acquainted 
with the ideas of the numerous geologists of my native 
country. That desire has been gratified ; and it is with 
pleasure that 1 lay before you a short account of the results 
of my inquiries. 
. Germany has been visited by so many geologists, and so 
jtaany parts of that vast empire have been so minutely de- 
scribed, that one might imagine the geologist, in order to 
acquire a perfect knowledge of the country, had only to 
