viii CONTENTS. 



§ 19. The preparation of piasmine and fibrinogen .... 



§20. Fibrin-ferment: its action. Nature of the process of clotting 



§ 21. Why blood clots when shed 



§ 22. The influence on clotting exerted by tlie living blood vessels 



§ 23. The nature of this influence ; the action of the white corpuscles 



PAGfc 



22 



23 

 26 

 27 

 29 



SECTION II. 



The Corpuscles of the Blood. 



The Bed Corpuscles. 



§ 24. The structure of the red corpuscles ; laky blood ; stroma, and haemo- 

 globin 31 



§ 25. The number of red corpuscles in human blood ; method of enumer- 

 ation 33 



§ 26. The destruction of red corpuscles . . . . . . .34 



§ 27. The formation of red corpuscles in the embryo and in the adult; 



hsematoblasts 35 



The White Corpuscles. 



§ 28. The structure of the white corpuscles ; characters of the cell-substance 36 



§ 29. The chemical bodies present in white corpuscles 37 



§ 30. The white corpuscles as a type of living matter; metabolism, kata- 

 bolic and anabolic changes. The nature and relations of the 



' granules ' ; living substance, food and waste 39 



§ 31. The origin of the white corpuscles. Leucocytes 42 



§ 32. The disappearance of the white corpuscles. Their influence on the 



plasma. Different kinds of white corpuscles 43 



Blood Platelets. 

 § 33. The characters of blood platelets 44 



SECTION III. 



The Chemical Composition of Blood. 



§ 34. General chemical characters 46 



§ 35. Chemical composition of serum 46 



§ 36. Chemical composition of red corpuscles 47 



§ 37. Chemical composition of white corpuscles 48 



SECTION IV. 



The Quantity of Blood and its Distribution in the Body. 



§ 38. The determination of the quantity of blood in the body, and the- main 



facts of its distribution 49 



