PHENACETIN. 



this temperature. Schweitzer thinks this tost is positive in identify- 

 ing mixtures of these chemicals and that further examination U useless. 

 The following table is taken from his communication: 



of mixture* <>f t ,h, n<ic>'i'm <ni<l urt'imiitiif 



Examinations made in this laboratory of mixtures of phenacetin and 

 acetanilid gave the following results: 



Melting points of mixtures of phenacetin and acetanilid (dru</ lalmratnry). 



The above observations were made several times on finely powdered 

 anh} T drous thoroughly mixed material with a standard thermometer, 

 the entire mercurial column being in the heating medium. The melt- 

 ing points were taken in a long capillary tube attached to the thermom- 

 eter, and both were placed in a test tube 20 cm long and 2 cm in diame- 

 ter. The test tube was then filled with glycerin and placed in a liter 

 Erlenmeyer flask nearly filled with glycerin. The temperature was 

 gradually raised and kept uniform throughout the mass by a continual 

 current of air. The results are not in perfect accord with Schweitxc r"-. 

 The various mixtures began to soften at about 92 C., but not uni- 

 formly at that temperature. 



