POLENSKE PROCESS. 



245 



To facilitate the melting of the fatty acids, the author proposes 

 lengthening the bulb tube, used by Wollny for distillation, above 

 the bulb to 15 cm. and placing on it a small condenser, through 

 which water is kept running during the melting of the acids, 

 this being removed during distillation ; the same results are 

 obtained by the use of this apparatus as by Wollny's. 



The Polenske Process. For the detection of coconut 

 oil in butter, Polenske has drawn up very careful directions 

 for the carrying out of the Reichert-Wollny method, and his 

 process includes a determination of the volatile insoluble acids 

 in addition to the estimation of the volatile soluble acids. Alcohol 



Fig. 33. Polenske Apparatus. 



must not be used for the saponification, and glycerol, which was 

 first introduced by Lefimann and Beam, is employed ; in fact, 



