OI- FOUKTII REPORT — 1834. 



INDEX TO THE SUBJECTS OF THE REPORT ON CONTAGION. 



§ I. The animal body generates morbid poisons. 



II. Causes which, actino: on the body, produce those poisons. 



III. Originate independently of crowding and confinement. 



IV. Sporadic diseases. 

 V. Specific diseases. 



VI. Specific diseases not always traceable. 



VII. do not now originate. 



VIII. produce only their own kind. 



IX. Conversion of sporadic into specific diseases. 



X. Liquid contagious poisons. — Inoculation. 

 XI. Spontaneous changes in liquid poisons. 

 XII. Chemical nature of liquid poisons. 



XIII. Modes of communication of morbid poisons. 



XIV. The volatile poisons are vapours, not gases. 



XV. Their chemical constitution unknown. — Not animated. 

 XVI. Channels through which vaporous poisons issue. 

 XVII. Emanations spread by diffusion, not by affinity. 

 XVIII. Sphere of their activity limited. 

 XIX. No constant boundaries assignable. 



XX. Emanations carried by currents. — Instances. 

 XXI. The general atmosphere never infected. 

 XXII. Porous bodies imbibe contagious vapours. — Fomites. 



XXIII. Fomites retain their properties durably. 



XXIV. Modifications of the power of porous bodies to absorb fomites. 

 XXV. Persons convey fomites without injury to themselves. 



XXVI. Contagions acting once only, and oftener. 

 XXVII. Two contagions seldom act at once. 

 XXVIII. Contagions require to be applied for a certain time. 

 XXIX. Period when diseases begin to be contagious. 



XXX. cease to be contagious. 



XXXI. Periods of latency or incubation. 

 XXXII. Causes predisposing to the reception of contagion. 



XXXIII. preventing infection. — Natural exemptions. 



XXXIV. Effect of HABIT in protecting against infection. 

 XXXV. But habit not an invariable security. 



XXXVI. Exciting causes. 

 XXXVII. Influence of climate and weather. 

 XXXVIII. General Remarks. — Experimental inquiry proposed. 

 XXXIX. Diseases commonly contrasted with the contagious. 

 XL. Endemics ; their production and causes ; miasms. 

 XLI. Epidemics; their general phaenomena, and dependence on atmo- 

 spheric changes. 



