1883. ] Recent Literature. 177 
may use a geological simile, as De la Beche’s Geological Ob- 
server and Juke’s Manual, but is naturally rather more comprehen- 
sive. It isan expansion of the author’s article, “ Geology,” in the 
“Encyclopedia Brittanica.”’ 
e comprehensive nature of the work will be seen by the ti- 
tles of the books and parts into which it is divided. Book 1. 
Cosmical aspects of geology. 11. Geognosy—An investigation 
of the materials of the earth’s substance. Part1. A general de- 
scription of the parts of the earth. Part 2. An account of the 
composition of the earth’s crust—Minerals and rocks. 1. Dy- 
namical geology. Part 1. Hypogene action—An inquiry into 
the geological changes in progress beneath the surface of the 
earth. Part 2. Epigene or surface action. 1v. Geotectonic (struc- 
tural) geology; or the architecture of the earth’s crust. Part 1. 
Stratification and its accompaniments. 2. Joints. 3. Inclina- 
tion ofrocks. 4.Curvature. 5. Cleavage. 6. Dislocation. 7. Erup- 
tive (igneous) rocks as part of the structure of the earth’s 
crust. 8, The crystalline schists as part of the architecture 
of the earth’s crust. 9. Ore deposits. 10. Unconformability. 
v. Paleontological geology. vi. Stratigraphical geology. Part 
I. Archean. 2. Paleozoic. 3. Mesozoic or secondary. 4. Caino- 
zoic, or Tertiary. 3. Quaternary, or Post-tertiary. vil. Physio- 
ie geology. 
ra ough Commander Bartlett’s paper in the 
Journal of the Americ n Geographical Society appeared about a 
year ago. Dr. Croll’s hypothetical stoppage of the Gulf stream 
to account for the glacial climate of Northern Europe is not war- 
tatleston, S. C., and hence the Gulf stream must have existed 
roughout the quaternary period; besides this, according to Dr. 
Carpenter, there is a general movement of warm surface-water 
BLN in the Atlantic ocean, the Gulf stream not being the 
agent of the transfer northward of tropical heated water. 
