JAMES DWIGHT DANA. 619 
ciated rocks of the vicinity of Great Barrington, Berkshire Co., 
Mass.,’ 1872-3; ‘An account of the discoveries in Vermont 
geology of the Rev. Augustus Wing; the relations of the geology 
OmVermont to that ote berkshire, | 1d7 70. une Inudson, River, 
age of the Taconic Schists,’”’ 1879; ‘‘The geological relations of 
the Limestone belts of Westchester Co., New York,” 1880-81; 
“On the Southward ending of a great synclinal in the Taconic 
Range,” and ‘The Corlandt and Stony Point Hornblendic and 
Augitic rocks” in 1884; ‘Taconic rocks and stratigraphy,” 1885, 
1886 and 1887; “Lower Silurian fossils from a limestone of the 
original Taconic of Emmons,”’ 1886; and the final paper of the 
series, ‘‘A brief history of Taconic ideas,” in 1888. In addition 
to the above are ‘Two atlases, one of Berkshire Co., Mass., and 
the other of Westchester Co., New York, having on the back the 
title ‘Taconic Rocks,’ containing my | his] notes made in the 
geological survey of these regions,’ which were specifically 
bequeathed by his will to the Library of Yale College. 
The solution of the problems was not alone Dana’s work: the 
fossils discovered by Wing, Billings, Dale, Dwight, Ford, Bishop, 
Walcott and others were the evidences which finally redistrib- 
uted the various members of Emmons’ system into their proper 
places in the standard systems of the Paleozoic already defined. 
But as we look back over the battle and trace its progress, it is 
evident that the energy and thoroughness with which Professor 
Dana attacked the problems, if he did not do all the work, 
availed much in inspiring and directing the work of others; the 
bearings and importance of whose discoveries he was often 
quicker to discern than the discoverers themselves, and always 
gave full credit to whomsoever it was due. The final paper, “A 
brief history of Taconic ideas,” is an admirable example of the 
calm judicial spirit with which he was accustomed to rise above 
all personal prejudices and individual opinions and to define 
scientific facts as they are. 
Two other problems which grew out of the investigations 
already mentioned were, the interpretation of the partially meta- 
morphosed rocks of the Connecticut Valley, and that of the 
