BLOOD 273 



and one-seventh for children to the percentage 

 found by the haemoglobinometer, with the stand- 

 ard solution described above. 



HAEMORRHAGE AND ^REGENERATION 



Determine the specific gravity, number of red 

 and white corpuscles per millimetre, and per- 

 centage of haemoglobin in the same animal under 

 the following conditions : Normal ; two hours 

 after a profuse hsemorrhage ; one day, three days, 

 and five days after the hsemorrhage. Plot all 

 three curves upon one co-ordinate system. 



PHYSICAL ASPECTS OF COAGULATION 



Physical Action of Salts in the Coagulation of 

 Colloidal Mixtures. 1. Boil egg-albumin diluted 

 with about eight volumes of water. The colloid 

 will not coagulate. Add crystals of magnesium 

 sulphate gradually. Coagulation will take place. 1 



2. Dip a thin thread of silk in 2 per cent 

 solution of calcium chloride and lay the thread 

 upon a glass slide beneath a cover-glass. Allow 

 boiled solution of egg-white (1 : 8) to run under 

 the cover-glass. Examine the process of coagu- 

 lation under a magnification of about 500 diam- 



1 HAYCRAFT and DUGGAN : British Medical Journal, 1890, 

 p. 167. 



18 



