CONTENTS. 



ON DUST AND DISEASE. 



FAOB 



Exjjeriments on Dusty Air 1 



The Germ Theory of Contagious Disease 6 



Parasitic Diseases of Silkworms. Pasteur's Beseaiches . , 9 



Origin and Propagation of Contagious Matter . . . . 18 



The Germ Theory applied to Surgery 22 



The Luminous Beam as a means of Besearch . , . . 27 



The Floating- Matter of the Air 28 



Dr. Bennett's Experiments .... . . 31 



OPTICAL DEPORTMENT OF THE ATMOSPBERE 

 IN RELATION TO PUTREFACTION AND INFEC- 

 TION. 



§ 1. Introduction 45 



§ 2. Method of Experiment 49 



§ 3. Deportment of Urine 51 



§ 4. Mutton-Infusion 54 



§ 5. Beef-Infusion ... 56 



§ 6. Haddock-Infusion 66 



§ 7. Turnip-Infusion 68 



§ 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, Tnrbot, 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 



