252 The American Geologist. October, 1893 
Among tlit* most prominent exhibits in man}' of the build- 
ings is that of New South Wales. This young but vigorous 
southern laud is, however, the only exhibitor from the Austra- 
lian colonics. This fact perhaps results from her different 
fiscal legislation. 
Unfortunately the revised geological map of New South 
Wales had not arrived at the time of our examination, but 
enough is shown to prove that excellent work is being done 
in this survey. Fossils from all the formations occurring in 
the colony are on exhibition to prove the age of the strata. 
Foremost among these and most interesting to paleontologists 
in this country are the Carboniferous forms of Mesozoic as- 
pect illustrating the Glossopteris flora so long a source of 
difficulty in correlating these southern strata. A good cata- 
logue of the maps and publications of the survey maj^ be ob- 
tained from the Commissioner, Mr. Carne. 
Mexico, with a very creditable exhibit along other lines, 
shows a geological map of that republic, indicating to what 
point the work of the survey has progressed under Don An- 
tonio del Castillo, the director. Her material is very widely 
scattered through the buildings. In minerals, as might be 
expected, she makes a fine displa}', especially in her so-called 
onyx and the new pink garnets, or grossularite. 
In the various displays from Germany are many excellent 
maps general and special. It could hardly be otherwise. A 
large relief map of the Hartzgeberge, by Dr. Krantz of Bonn, 
sells at the low price of fifty dollars, and one of the classic 
locality of Coblentz on the Rhine for twenty. It is 
quite superfluous to praise the execution of these or 
any other maps issued by the German surveys, as they are 
conceded generally to have no superiors. Examination of 
the specimens shown will amply confirm this opinion. 
Among the minor exhibits having considerable interest is 
a model of the island of Trinidad, showing the pitch lake 
from which the best asphalt for street pavements is obtained. 
This is one of the most singular deposits known. The lake, 
which occupies only a small part of the island, has an area of 
132 acres, and is said to contain six million tons of the min- 
eral. Its surface is in most places hard enough to bear up 
men and horses, except in the middle of the day, when it be- 
