372 £. Billings on the claim of Priority in the determination 
at a different conclusion from that intended to be induced by the 
icarned Professor. 
The first of these sections crosses Lake Champlain from Platts. 
burgh, traversing Hero Island and the towns of Milton and Fair- 
fax. e only place where it crosses the Red Sandrock, is near 
St. Albans, aud it must therefore pass through the Georgia slates 
very near the locality of the far-famed primordial trilobites 
According to the new map of the Vermont Survey, above quo- 
ted, there is here a strip of Red Sandrock two miles wide, lying 
along the shore of the lake. This is followed by four or ti 
miles of the Georgia slate and then about two miles of granula 
quartz rock. Prof. Hall’s section represents the latter as the 
Potsdam sandstone, but the Red Sandrock and all the Georgia 
slates are called “ Trenton and Lower Limestones of the Mohawk 
Series.” His section is colored,—the Potsdam, pink, and his 8 
ealled Trenton, blue. The remainder of this section does not 
~— any of the rocks under discussion and need not be noticed 
ere. 
in which they were found in the Hudson river grout but a8 
soon as he saw that this view was incorrect, he denied that he 
had ever examined this part of the country at all, and at the 
same time gave the public to understand that he had been 
there showed him the descriptions and obtained his authority a4 
the addition of the note in which Sir W.’s opinion is sta 
ave been a question of the relations of these trilobites oa 
would at once have been referred to the primordial ty pes ® 
fore investigated and considered conclusive; and tet im 
Sore relied upon the opinion of the distinguished geologist 
shed May we be permitted to ask, to what formation are the Georgia slates t ogan’s 
in these “few copies” which were distributed before he obtained Bit W. E. Taconic 
‘opinion? Are they referred to the Hudson river group or to Dr. Emmons’s 
._+ Does he not here admit that the 12th Regents Report was altered by him in 
‘ant matter after the date of its publication. 
piece 
