ILLUSTRATIONS 



FIG - PAGE 



1. Diagram of osmometer 5 



2. Hematocrite 7 



3. Plasmolysis in cells from Tradescantia discolor 9 



4. Apparatus for measurement of the depression of freezing point of solution . 11 



5. Diagram of conductivity cells 18 



6. Wheatstone Bridge for the measurement of electric resistance 18 



7. Diagram to show type of electrodes used in studying electromotive force . . 30 

 9. Chart of tints as used in colorimetric measurement of H-ion concentration. 



(Color Plate.) 34 



8. Diagram of apparatus for the measurement of the H-ion concentration . . 31 



10. Diagram of apparatus for saturating blood and plasma with expired air . 43 



11. Van Slyke's apparatus for measuring the CO 2 -combining power of blood in 



blood plasma 44 



12. Ultramicroscope (slit type) for the examination of colloidal solutions . . 52 



13. To show diffusion into gelatin of a crystalloid stain, and the nondiffusion 



of a colloid stain ... 53 



14. Diagram from W. Ostwald showing the relative size of various particles and 



colloidal dispersoids compared with a red blood corpuscle and an 

 anthrax bacillus 54 



15. Capillary analysis of colloids 56 



16. Diagram to show structure of gels 61 



17. Diagram to illustrate surface tension 64 



18. Traube's stalagmometer 65 



19. Diagram of the graphic coagulometer 109 



20. Coagulometer 110 



21. Mercury manometer and signal magnet, arranged for recording the mean ar- 



terial blood pressure in a laboratory experiment 124 



22. The arterial blood pressure recorded with a mercury manometer (lower trac- 



ing) along with a tracing of the respiratory movement of the thorax . 125 



23. Hurthle's spring manometer 126 



24. Arterial pressure recorded by a spring manometer 126 



25. Diagram based on experiments on dogs to show the systolic, diastolic and 



mean blood pressures at different parts of the circulatory system . . 127 



26. Apparatus for measuring the arterial blood pressure in man 129 



27. Effect of cutting the vagus nerve on the arterial blood pressure 135 



28. Effect of stimulating the peripheral end of the right vagus on the arterial 



blood pressure 136 



29. Effect of stimulation of the left splanchnic nerve on the arterial blood pres- 



sure 137 



30. The effect of rapid and slow hemorrhage on the arterial blood pressure . . 138 



31. Diagram of experiment to show that the diastolic pressure depends on the 



elasticity of the vessel wall 143 



32. Diagram of Wiggers' optical manometer 146 



