11 
Professor Wadsworth spent a portion of the year in Cambridge, 
arranging the lithological collections. He is now in Minnesota, 
engaged in preparing a report on the lithology ‘of that State for 
the survey under the direction of Prof. N. H. Winchell. The pub- 
lication of the “ Lithological Studies” has not yet been resumed, 
the work remaining in the condition indicated in the last Report. 
The work in Minnesota will be of value in the continuance of the 
“ Lithological Studies,” especially as a class of rocks is largely 
represented in the region where Professor Wadsworth now is, with 
which our collections are very imperfectly supplied. 
