1884. ] Recent Literature. 511 
not belong to it. Some of its members desire to make it a school 
for teaching science to the young, a function which does not be- 
long to an academy of sciences, but to a university or other school. 
That the primary object of the academy has always been original 
research, is well known; and that it is the desire of most of the 
scientific specialists connected with it that it should be devoted to 
that purpose, is undoubted. Instruction to post-graduates might 
be given in connection with its laboratories of research, but not 
to such an extent as to interfere with the main object. 
The inaugural address of Professor Sharp was a clear exposition 
of the methods employed in some of the continental laboratories, 
and furnished an outline for work to be done in his own depart- 
ment, invertebrate zodlogy, in the academy. 
One reason for introducing this institution so frequently to the 
notice of our readers is, that it is representative of the average 
local American “ Academy of Sciences.” If these institutions are 
ever to resemble their prototypes of the old world, it will have to 
be by a process of growth something like that which the oldest 
academy in the country is undergoing. They will have to pass 
from the club stage to the working stage, and self-preservation 
will require a third more or less exclusive stage. The obstacles 
to be overcome will be very similar everywhere. 
4 8 
RECENT LITERATURE. 
S TERTIARY HISTORY OF THE GRAND CANON DISTRICT.’ 
aborate mono raph on perhaps the most imposing 
aha world, has been thoroughly well done and superbly 
Durroy’ 
—This el 
i a changes which have taken place and have produced 
re er wonderful scenic features of this region. Before the 
of te erous period thick beds of Silurian and thinner deposits 
haved 
i » €normously eroded and again submerged. Upon the 
strata over the entire Plateau province. The 
‘Ves osits may have accumulated in an ocean 0 
Werad Cali ai sii iy Z Survey. J. W. PowELL, director. Tertiary History of 
is Sa Gonera with atlas. By Captain CLARENCE E. DUTTON, U.S. A. 
t Printing Office, 1882. 4to, pp. 264. 
