LIST OF ILLUSTRATIONS 1 



1. Illustrating the use of the graphic method in recording the contraction of a frog's 



muscle (drawn for this edition) 6 



2. Muscle curves recorded on the same drum 7 



3. The mercury manometer. 8 



4. Blood pressure curve of rabbit 8 



5. Membrane manometer (courtesy of Prof. W. T. Porter) 9 



6. Kymograph with "endless" paper 9 



7. Electric signal used as time marker 10 



8. Curves of blood pressure in left ventricle and aorta of the dog . . . .11 



9. Recording tambour of Marey 11 



10. Receiving tambour for pulse record 12 



11. Pulse curve from carotid of man 12 



12. Capillary electrometer 13 



13. Action currents of dog's heart . .13 



14. Polystomella venusta 17 



15. Thalassicola nucleata . .18 



16. Parenchyma cells from root cortex of Frittilaria . . . ... .21 



17. Leaf showing starch formation *'...' . . .23 



18. Root of bean with Bacteria tubercles . . . . . . ' . . . .23 



IQ.Gromia oviformis . . .35 



20. Amoeba polypodia ... 35 



21. Phases in the life history of Amoeba (from Mill's "Animal Physiology") . . 36 

 22. White blood corpuscle of frog with bacillus ingested . . .... . 37 



23. Vampyrella spirogyrce 37 



24. Frontana leucas (courtesy of Prof. Gary N. Calkins) 41 



25. Chlorophyll bodies in Lemna triscula 42 



26. Mode of movement of Amoeba 43 



27. Amoeboid movements of white blood corpuscles 43 



28. Vorticella (from Mill's "Animal Physiology") 44 



29. Demarcation current in a muscle 47 



30. Electric apparatus of cramp fish (from Mill's "Animal Physiology") ... 49 



31. Illustrating chemotaxis 54 



32. Motor response in Paramcecium (courtesy of Prof. Gary N. Calkins) ... 55 



33. Distribution of Bacteria in sunlight 57 



34. Effects of constant current on the shrimp, Palcemonetes 60 



35 Opalina ranarum . 61 



36. Cross section of intestinal musculature of cat .62 



37. A shoot of Antennularia antennina 64 



38. Crystals of serum albumin ... . . . . . . . .69 



39. Face mask for respiration experiments. . . .85 



i Unless otherwise stated the illustrations in this edition are the same as in the third German edition. 



