Marcou’'s Geology of the United States. “S23 
rafting millions of tons of detritus—boulders and sand—to more 
southern latitudes. 
world now mourns. But his facilities and opportunities were 
limited, and much remains to be accomplished. 
I need not pursue the subject further, and have already de- 
tained the Association longer, perhaps, than the occasion war- 
rants. The deep interest which I feel in a field of investigation, 
which has long engaged my attention, must serve as my apology. 
Arr. XXXVI.— Review of Marcou’s “Geology of North America.”* 
TE volume on American Geology just published by Mr. Jules 
Marcou, demands more than a passing notice. Coming from a 
Professor in the Federal Polytechnic School of Switzerland, 
who is known to have traversed this country widely, and whose 
memoirs and American geological map form part of the publica- 
tions of the Geological Society of France besides being bu- 
ted through several European journals, it is of interest to all to 
inquire into the character of the work and the reliability of the 
author’s conclusions. 
may honor it, and here register it for the use of the science. 
The work on the Geology of North America contains, (1) an 
account of the author’s researches in America; (2) a general re- 
i i the Praries of Arkansas and 
x Bevlogy. ct North America, with Two eg actehag nisin Nevada of Californi 
RCOU, 
indo ky Mountains hid ae Mexico, 
ally made for the Uni tes Gov r r 
Geology in the Federal Polytechnic School | aegagy thes Magee 
te. 4to., se ls ich, 
With Piste i the title of “United States Geologist,” we ogg med a en 
lightenment of readers, such 0 . e Gov r 
and no national Geological Corps. When an expedition explo sur- 
vey is organizing, is usu associated with the for scientific 
Department in charge of the survey 
izing, some a8 
res : the ; 
silecind ae a ie pee ie peologints and sometimes otherwise. 
