Chapter X

On the servitude of rivers--Practical knowledge of the ancients--Early
Roman history a fable--The great social problems of _race_ and
_climate_ in some measure unknown to the Romans--First mooted in the
reign of Justinian--Present phases of human society--How affected by
these two problems--Influence of civilization over the earth
pp. 99–110

CONCLUDING CHAPTER.

Author’s theory of malaria--Has malaria a real existence?--Action of
ferments on the blood--A malarious air not dislodged by storms--Quality
of the air over ditches, &c.--Experiments by the Author on microscopic
mollusca--Influence of chemistry over physiology--Ammonia--Its
volatility and universal prevalence in the air--Its sources and action
on living bodies--Danger of drainage-works during summer--Spread
of plants through the air--Appearance of strange plants in a
country--Conclusion--Various phases of sanitary science--laws of
decomposition and composition--Results to man of a false position in
nature pp. 111–128

APPENDIX pp. 129–136

ERRATUM.

Page 98, line 2 (note), _should read_ “Hydrogen is the lightest known
substance; its specific gravity is to that of air 732 to 10,000.”

AN INQUIRY

INTO

THE ORIGIN AND INTIMATE NATURE

OF

MALARIA.