Page 



B. Production of urea; experiments on dogs 764 



C. Chemical phenomena of respiration 765 



D. Pulmonary capacity 768 



E. Intra-pulmonary pressure 771 



F. Arterial pressure 773 



2. Prolonged stay in compressed air 775 



Chapter V. Influence of changes in barometric pressure on plant life 780 



Subchapter 1. Pressures less than one atmosphere 782 



1. Germination ._ 782 



2. Vegetation 787 



Subchapter 2. Pressures above one atmosphere 788 



1. Germination 788 



A. High pressures with air of low oxygen content 792 



B. Normal pressure; superoxygenated air 793 



C. Low pressures; superoxygenated air 794 



2. Vegetation 797 



Subchapter 3. Summary 798 



Chapter VI. Action of changes in barometric pressure on ferments, 



poisons, viruses, and anatomical elements 799 



Subchapter 1. Fermentations by organisms 800 



1. Putrefaction 800 



A. Meat 800 



B. Blood 817 



C. Eggs 819 



2. Coagulation of milk 820 



3. Alteration of the urine 823 



4. Brewer's yeast 826 



5. Wine ferments 827 



6. Molds 831 



Subchapter 2. Diastatic fermentations 834 



1. Saliva and diastase 835 



2. Pepsin 837 



3. Inversive ferment of yeast 838 



4. Myrosin 838 



5. Emulsin 839 



Subchapter 3. Action of oxygen at high tension upon anatomical 



elements 839 



Subchapter 4. Use of oxygen at high tension as an experimental 



method 842 



1. Dry rot of fruit 843 



2. Ripening of fruits 844 



3. Venoms 845 



4. Viruses 846 



XXVI 



