F. V. Hayden on the Geology of Northeastern Dakota. 15 
them a severer example. A man such as ie absorbed in his 
work, and shutting himself away from the outer world, was likely 
to be sometimes abrupt, or laconic, or even incautious, in his ut- 
terances; these minarations, from the eir bluntness or their trath- 
his own life, and urge his favorite pupils to ian from 
experience lessons of moderation and self-restr aint, both in pass- 
ing their judgments on the labors of others, and in the amount 
of labor which they felt it their duty to exact from themselves. 
There occurs but one more question regarding this great and 
venerable man; the writer of this memoir gladly adopts this lan- 
guage, great and venerable, because they are the very words se- 
lected by men who served him long and who knew him well, 
and who are themselves doing good public service in their own 
day. Itis well known that great theological activity, not to say 
theological strife, surrounded Encke and every other intellectual 
thinker in Germany; it may not, perhaps, concern us, simply as: 
efforts of the human mind. In reply to this question, we are 
told by those who knew him intimately, that Encke ‘retained 
through life the strength and simplicity of his early faith; and we 
also learn that he was heard repeatedly to say, that one of the 
greatest pleasures of his life was derived from the fact, that one 
of his sons had become a minister of the Gospel. 
Art. IT.—Shetch of the Geology of Northeastern Dakota, with a 
Haron he a short visit to the celebrated Pipestone Quarry; by F. V- 
AYDEN, 
of the och in which the pipestone pee is s Ioektedt froth the 
fact that no well-defined organic remains co . be found. There- 
fore certain facts are noted down with the- ee that they may 
