480 HENRY S. WASHINGTON 
A comparison could also be instituted with the other igneous 
rocks of the New England region, going to show that great 
similarities exist. But our knowledge of most of the other igne- 
ous regions of New England and Canada is so scanty that the 
time does not seem ripe for this. It will be sufficient to note 
that some of the rocks of Essex county show great analogies 
with, for instance, those of Litchfield, Maine, and Red Hill and 
Mt. Ascutney, New Hampshire. Farther west, in the Adiron- 
dacks and near Montreal, the character of the magma seems to 
be different, as has been pointed out recently by Cushing,’ 
though there are many resemblances. 
HEnryY S. WASHINGTON. 
tH. P. CusHING: Bull, Geol. Soc. Amer., Vol. X, p. 191, 1899. 
