11EACTION OF CELLS 63 



For dead yeast (killed by means of toluol) the 

 figures are rather irregular, as is seen from the 

 diagram giving the product qt corresponding to 

 the evolution of iooo gramme-calories, but still we 

 might conclude that the ^/-rule is valid. The lowest 

 curve represents the heat evolved during the lapse 

 of two hours, when different quantities of dead yeast 

 (i, 2, 5 or 10 grammes) act upon the same quantity 

 of sugar-solution (50 g. in 250 cc. solution). Here 

 there is no indication that the rule of Schutz might 

 be applicable. 



Another vital phenomenon has been investigated 

 by Madsen and myself, namely the decomposition of 

 red blood-corpuscles by means of haemolytic poisons 

 such as ammonia, sodium hydrate or tetanolysin. 

 The experiments were carried out at o° C. As 

 example I give the figures for ammonia. 



The longer the process goes on the greater is the 

 number of the blood-corpuscles killed ; they give 

 up their red colouring matter, the haemoglobin, to 

 the surrounding solution, which is in most cases 

 the so-called physiological salt solution, i.e. 09 per 

 cent NaCl-solution in water. The said number is 

 reckoned in per cent of the total number of blood- 

 corpuscles and called the degree of haemolysis. The 

 solutions contained 5 per cent of blood-corpuscles, and 

 different concentrations of ammonia were used ; the 

 concentration 1 denotes 0001 normal NH 3 . The 

 following figures giving the time necessary for 

 reaching a certain given degree of haemolysis were 

 obtained. Immediately after the observed figures, 



