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