132 INJURY, RECOVERY, AND DEATH 



The diagram consists of an equilateral triangle, the 

 apices of which represent equally toxic pure solutions. 

 Thus the point A represents pure CaCL (0.164 M), B 

 represents pure KC1 (0.13 M), and C represents pure 

 NaCl (0.12 M). All points on the sides of the triangle 

 represent mixtures of two solutions only, the composition 

 depending on the position of the point. Thus the point 



25 50 75 100 NACL 



KCL 100 75 



CACL2 



Fia. 53. Diagram representing the composition of various mixtures of KC1 -f- NaCl -|- Cadi: 

 this serves as the base of the solid model shown in Fig. 54. 



H represents a solution made by mixing the equally toxic 

 solutions NaCl 0.12 M and KC1 0.13 M in such proportions 

 that in the mixture 50% of the dissolved molecules are 

 NaCl and 50% are KCL In the same way G represents 

 a solution in which the molecular proportions are NaCl 

 25% + KC1 75% ; / represents NaCl 75% + KC1 25% ; 

 E represents KC1 50% + CaCl 2 50% ; K represents NaCl 

 50% + CaCl 2 50%. 



All points in the interior of the triangle represent mix- 

 tures of the three equally toxic solutions NaCl 0.12 M, 

 KC1 0.13 M, and CaCl 2 0.164 M. Along the line FJ are 

 represented mixtures in which the dissolved molecules are 



