Drainage in the Adiro/idacks.—Brigha/n, 221 
of the geology of this part of the Adirondacks is by Prof. 
Kemp,* who, in his introduction, gives an outHne of the 
topography and supports with a number of considerations the 
view that the valleys are mainly due to the faults and that 
the mountain ridges are of the block-tilted type, though this 
is affirmed to be less readily demonstrable in- massive and 
metamorphic rocks. This increases the interest and the 
perplexity of the problem, and will make the more welcome 
to physiographers the structural facts which Prof. Kemp and 
others are working out in the Adirondack region. The drain- 
age is also very ancient, hence through oscillation and the 
baselevelling processes there may have been several oppor- 
tunities for new adjustments, but through all it would appear 
that the original streams consequent on folds or faults of 
northeast by southwest trend have transmitted their axial 
direction to their successors. If the region has ever been 
baselevelled and the drainage revived, the elevation was not 
accompanied by tilting of such a nature as to send the master 
streams across the great structural lines. All goes to empha- 
size the suggestion of Prof. Davis that "every case must there- 
fore be examined for itself before the kind of re-arrange- 
ment that may be expected, or that may have already taken 
place, can be discovered." 
It remains to note a few features shown by the sketch 
map. The south fork of the Boquet river, flowing northeast, 
makes two distinct elbow turns, first to the southeast and 
then resumes its original direction to the northeast, in the 
main valley. The extreme head waters of Lindsay brook 
show a tendency to open up the Boquet valley farther to the 
southeast. The north fork of the Boquet occupies another 
parallel valley two miles northwest of the south fork. This 
stream makes three elbows, first to a valley in line with south 
fork, then to the main valley. In the case both of the Boquet 
and the Schroon, tributaries flowing to the southeast are con- 
spicuously longer than those flowing northwest. This is 
readily explained by the steep southeastward inclination of the 
country and the consequent rapid headward cutting of the 
tributaries flowing from the northwest. Similar features in 
♦Preliminary report on the geology of Essex county. 47th Report 
New York State Museum, 1894. 
