528 APPENDIX. 



cently experimented upon seven individuals of different ages, with 

 the following results. The numhers are in every case the mean of 

 several countings. 



In children from 2 to 12 years 

 In young men from 21 to 22 years .... 

 In men 30 to 50 



In old persons 60 to 80 



In young women from 14 to 38 years, when not men- 

 struating 



In young women when menstruating.... 

 In when pregnant 



220 

 330 

 346 

 381 



389 

 247 

 281 



The view formerly held by Bonders and Moleschott, that the 

 colourless corpuscles increase shortly after taking food, and 

 diminish on fasting, is confirmed by more recent observations 

 independently made by Moleschott, who especially finds that food 

 rich in albumen increases their number much more considerably 

 than food poor in that substance. G. E. D.] 



(26) Addition to p. 238, line 9. It is principally in the 

 disease first recognised by Virchow, and named leucaemia by him 

 fand independently discovered by Bennett, who terms it leucocy- 

 thtemia] , that we find a very great augmentation of the colourless 

 corpuscles, their ratio to the coloured ones being often as 1 : 3 ; 

 they consequently communicate a pale red colour to the blood. 



Moreover, the blood of the splenic vein is richer in colourless 

 cells of various forms than, that of any other vessel, as has been 

 especially shown by Funke.* It has been already mentioned 

 (vol. ii, p. 106) that I found the blood of the hepatic veins much 

 richer in colourless cells than that of the portal vein. 



(27) Addition to p. 239, line 10. We have already spoken, in 

 vol. i, p.. 358, of the different amount of fibrin contained in the 

 blood in diseases. It appears, from the most recent analyses of 

 Becquerel and Rodier,f that the amount of fibrin may vary very 

 considerably in the same group of diseases, in one case rising 

 above and in another falling below the mean number ; as, for 

 instance, in dropsies, and in the most various forms of heart- 

 disease ; in chlorosis the quantity of fibrin is either normal, or 

 amounts to O'l or 0'2-g- above the normal quantity; the reverse is 



* Diss. inaug. Lips. 1850; and Zeitschr. f. rat. Med. N. F. Bd. 1, S. 172- 

 218. 



t Gaz. mecL'de Paris. 1852. No. 24, 25, 26, 30, 31. 



