62 . The American Geologist. •^^^^^'- ^^'^-• 
as intrusive along the bedding planes of older rocks. They 
occur not only in the vicinity of the larger areas but also 
at considerable distances from them. A dyke of augen gneiss 
four feet in width sheared parallel to the bedding planes of 
the enclosing elastics, occurs in the Yukon valley nearly 
opposite the mouth of Ensley creek, and wider bands are of 
common occurrence throughout the district. The mineralogy 
of the narrow gneissic bands so far as worked out is essen- 
tially similar to that of the larger areas, the shearing is the 
same, they traverse the same rocks, and differ from them 
mainlv in the accident of size. 
It is evident in view of the facts given above that a part 
of the gneisses at least must be regarded as intrusive through 
and therefore younger than the clastic schists associated with 
them. It is still possible however as the work done so far has 
been largely of an exploratory character that older gneisses 
may be present in the district, but no evidence of this was 
obtained in the course of the investigation. 
EDITORIAL COMMENT. 
"The Monthly American Journal of Geology and 
Natural Science." 
Seventy-one years ago an English gentleman who was 
known as a geologist, and who had settled permanently near 
Schenectady, N. Y., started a scientific journal at Philadel- 
phia which had the above title. As a geologist Mr. G. W. 
Featherstonhaugh was later for a short time engaged with 
the engineer corps of the United States.* He returned to Eng- 
land and died in France where he was in the diplomatic service 
of the English government. 
The journal which he established was short lived. Twelve 
numbers, making one volume were issued. It had the com- 
petition of the American Journal of Science at New Haven, 
then known as Silliuian's Journal, and the personal peculiari- 
ties of the editor seem not to have been such as to make the 
journal unanimously acceptable to the few American geolo- 
gists and other scientists to whom such a journal ought to 
appeal. 
