Mineralogy and Geology. oF 
than made up by the development of our resources for the production 
of other metals. 
r. Whitney’s work is certainly a most important addition to scien- 
tific literature, not merely in the English language but in all countries. 
It is a model of pure scientific style, and the mechanical part of the 
work is equalled only by the faultlessness of the proof-reading. 
pretty careful perusal of the whole volume we have failed to detect the 
first typographical error. 
City of San Salvador destroyed by an Earthquake.—On the night 
of the 16th of April last, the city of San Salvador was completely de- 
stroyed by an earthquake. The population of the city in 1852 was 
estimated at 25,000. The following facts relating to the country and 
the catastrophe are cited from different sources. ‘ 
e hills around the plain of San Salvador are covered with verdure, 
which, as the dews are considerable, keeps green through the dry as 
well as the rainy season. The city, with its white houses and churches, 
seemed, therefore, to be set in living emerald. About three miles to 
the westward of the city is the great volcano of San Salvador. The 
which rises on the northern border or edge of the crater, is 
rated by the jagged edges of the crater, and is much less in altitude 
than the cone. his cone seems to have’ been formed by ashes and 
Scoriee thrown out of the crater, which is represented as a league and 
Salvador,” the Lighthouse of San Salvador. Besides these are numer- 
Water is brackish of these, called “ Joya,” occurs about four 
t would be impossible to describe here the numerous active vents, 
€mitting smoke, steam and sulphurous vapors, which occur at or near 
