CONTENTS. 



PAGK 



Relation of Arsenious Acid to Membranes 24 



Extension of the Processes of Putrefaction and Fermentation in the Living Animal Body 25 



Facts 25 



What is to be understood by the term "Products of Disease" 25 



Antiseptic Substances retard the Extension of Contagion and Miasma 25 



Putrefaction Processes as Causes of Contagious Diseases 26 



Conclusions 26 



Power of Infection in what it consists 26 



A Challenge to Investigation 26 



The Parasite Theory 27 



The Itch : 27 



The Itch a Contagious Disease propagated by an Animal 27 



Contagious Diseases not communicated by Animalcules 28 



Parasites in Bodies of the higher Classes of Animals * 28 



Muscardine 28 



Parasites in Animals and Plants ** > 2g 



False Views of the Causes of Putrefaction are the Foundation of the Parasite Theory 2g 



Fungi and Infusoria do not occasion Putrefaction 2g 



Opposition between Putrefaction and the Process of Life 2g 



Fungi and Infusoria are subjected to Putrefaction, Fermentation and Destruction So 



Fungi and Infusoria are the Attendants, but not the Orginators of the Process of Putrefaction 30 



Fungi and Infusoria hasten the Process of Putrefaction and Corruption 3o 



By this Means they become the Enemies of the Process of Putrefaction 3i 



The Nature of Yeast Si 



Relation of the Yeast in Solutions of Sugar, in Grape Juice, and Beer Wort 3i 



The Formation of Yeast, Alcohol, and Carbonic Acid are mutually Dependant upon each other 83 



Vibriones in the Urine 32 



Fungi contain Sugar 32 



Change in the Process of Putrefaction in Heated Air 32 



Two simultaneously occurring Phenomena are frequently held to be a Cause, and its Effect 33 



Examples * 33 



A Storm regarded as the Cause of unusual Changes in the State of the Barometer 34 



Symtoms of Fever must not be regarded as the Causes from whence it arises 34 



Henle's Explanation of Fever 34 



What Course must be pursued in the Investigation of the Cause of Fever 34 



Point of View of the Investigation 35 



Inquiry into the Connection of the Spinal Cord with the Effects of Motion 35 



Regular and Irregular Motion 35 



Relation of the Phenomena of Animal Heat to those of Motion 36 



Relation of the Phenomena of Heat to the Oxygen of the Air 36 



Erroneous Conclusions drawn from bringing one Cause too prominently Forward 37 



Correction of Schleiden's View 37 



The Means by which Motion occurs - 37 



First : By the Communication of a Moving Mass 37 



Secondly : By an Attractive or Repulsive Force 38 



Chemical Processes, as Phenomena of Motion, belong to the second Kind 38 



Putrefaction and Fermentation belong to the first Order of Phenomena of Motion 38 



The Force of Gravitation gives no Rise in itself to Motion 38 



Want of Correctness in Expression, the Cause of Erroneous Conclusions and Misunderstandings 38 



Examples 39 



Point of Contact between Physiology and Chemistry 39 



"Deviation of Chemical and Mechanical Laws from the Laws which govern vital Phenomena 3 



Relation of the Properties of Elements to the Properties of their Combinations 39 



The Chemical Forces of the Elements have a Share in the Vital Properties 40 



The Relations between chemical and vital Effects must be investigated 40 



The Relation of the Weights of the Elements to Chemical Combinations 40 



The Universality of Laws of Mutual Dependance in Natural Phenomena 40 



The Way to attain to a Knowledge of the Relations of Dependance 41 



Examples of the Laws of Dependance Pressure and the Boiling Point 41 



The Boiling Point 41 



The Law of the Relations of Dependance is Distinct from the Causes by which these Phenomena are 



effected 42 



The Boiling Point, the Specific Gravity, and the Composition of a Body stand in the Relations of Depen- 

 dance to each other -. 42 



Specific Heat and Atomic Weight 42 



Specific Heat and Tone of Gases 43 



Electricity and Magnetism, Macnetism and Heat, Magnetism and Chemical Force 44 



Vital Properties are no Exception to a Law of Nature - 4-' 



Anatomy most essential 45 



Anatomy not alone sufficient 45 



What must be superadded ~ 45 



Chemistry alone is not sufficient 45 



What ia meant by Chemical Force 46 



Relations of Dependance cannot be established by a Numerical System 46 



Numbers are only Expressions of the Relations of Dependance 46 



Chemical Relations between Urea, Uric Acid, Allantoin, and Oxalic Acid 46 



The Method pursued by Chemistry to express these Relations 47 



What is meant by Chemical Formulae 47 



Importance of Formulae 47 



Reasons for the Chemist to Study the Products of Decomposition of a Body 48 



Misuse of Formulas 48 



Hopes 48 



