CONTENTS. 



ON DUST AND DISEASE. 



PAGK 



Experiments on Dusty Air 1 



The Germ Theory of Contagious Disease 6 



Parasitic Diseases of Silkworms. Pasteur's Researches . . 9 



^'^Origin and Propagation of Contagious Matter . . . . 18 



^ The Germ Theory applied to Surgery 22 



The Luminous Beam as a means of Eesearch . . . . 27 



The Floating- Matter of the Air 28 



Dr. Bennett's Experiments 31 



OPTICAL DEPORTMENT OF THE ATMOSPHERE 

 IN RELATION TO PUTREFACTION AND 

 INFECTION. 



§ 1. Introduction 45 



§ 2. Method of Experiment 49 



§ 3. Deportment of Urine 51 



§ 4. Mutton-Infusion 54 



§ 5. Beef-Infusion 56 



§ 6. Haddock-Infusion 56 



§ 7. Turnip-Infusion 58 



§ 8. Hay-Infusion 64 



§ 9. Infusion of Sole . 66 



§ 10. Liver-Infusion 66 



§ 11. Infusions of Hare, Rabbit, Pheasant, and Grouse . . 67 



§ 12. Infusions of Codfish, Turbot, Herring, and Mullet . . 70 



§ 13. Infusions of Fowl and Kidney 71 



§ 14. Boiling by an Internal Source of Heat . . . .72 



§ 15. Partial Discussion of the Results 73 



