404 General Notes. ipri 
GEOGRAPHICAL Nores.—M. Desiré Charnay has returned to — 
France from his travels in Yucatan, where he has studied the — 
ruins of Aké, Chichenitza and other cities. Aké is one of the 
oldest centers of the peninsula, and contains from eighteen to 
twenty pyramids, which, with what remains of their superstie — 
ture, belong to the early “cement” epoch of Toltec architecture — 
M. Charnay does not credit the great age some attribute to pi 
tec remains, but believes those of Yucatan not to ant K 
commencement of the fifteenth century. Chichenitza 1 
of his third journey, which is promised to appear before he sets 
out upon his fourth expedition, which will be in March of ths 
year. The Swedish expedition to Spitzbergen, under the leader 
ship of Baron G. de Geer and Herr Nathorst, has furnished maps 
which give the outlines of the fjords and valleys of the southern 
part of that island, and the relative depths of the sea arom 
and Scandinavia. A comparatively level plateau extends joa k 
e ocean The 
present. 
GEOLOGY AND PALÆONTOLOGY. 
INTERMITTENT WELLS IN NeEBRASKA.—In the neighbor 
Shelby, Polk county, Nebraska, are many wells wmo 
peculiar phenomena of intermittence. The wells of the 
