§ 3. THE SKY OF THE ALPS. [*]

V. ON DUST AND DISEASE. [*]

Experiments on Dusty Air. [*]

The Germ Theory of Contagious Disease. [*]

Parasitic Diseases of Silkworms. Pasteur's Researches. [*]

Origin and Propagation of Contagious Matter. [*]

The Germ Theory applied to Surgery. [*]

The Luminous beam as a means of Research. [*]

The Floating Matter of the Air. [*]

Dr. Bennett's Experiments. [*]