35 2 PHYSIOLOGICAL CHEMISTRY 



ments and filter while hot. Concentrate the filtrate to a small volume and put 

 away in a cool place for crystallization (Fig. in, page 344). To obtain xanthine 

 in crystalline form special precautions are generally necessary. Evaporate the 

 solution to dryness and test according to directions given in Chapter VI on 

 Nucleic Acids. 



