690 



angulRfpoint for watei- we (ind that over '/< •'' •''** triangle is 

 occupied by the liquid and pappy range, while naturally in this 

 case also, close along the latex-water-side a first liquid range in 

 found, not showing any coagulation on addition of a very small 

 quantity of acid, but, after kee[)ing, showing spontaneous coagula- 

 tion by the action of bacteria. 



The proper liquid range in fig. 5 is again limited by a doited 

 line; the pappy range is divided by a somewhat thicker dotted line 

 into two parts, a fairly liquid and a more pappy one. Formation 

 of a coherent coagulura takes place in the narrow strip parallel to 



Fig. 5. 



the latex — water — side and towards the side of the angulair-point 

 Latex: the total range towards the side of the angulair-jjoint acetic acid 

 gives a perfect coagulation, but in the shape of flocks or as a pap, 

 and not as a coherent lump. Both these ranges of coagulation are 

 roughly separated in fig. 5 by a dotted line. Therefore in this 

 respect too. there is an important 'difference between acetic acid 

 and the three other acids, with which the whole range of coagula- 

 tion gives a coherent coaguium. 



