Subject
Description and travel
10
Physical geography
7
Science
6
Geology
4
History
4
Plant morphology
4
Scientific expeditions
3
Astronomy
2
Botany
2
Cosmography
2
Mines and mineral resources
2
Volcanoes
2
Antiquities
1
Climate
1
Cryptogams
1
Discovery and exploration
1
Geography
1
INDUSTRIA Y COMERCIO
1
Indians of Mexico
1
Indians of South America
1
Mountains
1
Natural history
1
Nature
1
Navigation
1
Petrology
1
Philologists
1
SAL
1
Salt mines and mining
1
Scientists
1
Voyages and travels
1
Voyages around the world
1