ANALYSIS OF PERMITTED COLORS, 1907. 



185 



As a guide in ascertaining the conformity of these colors to their sup- 

 posed standards when judged by the analytical data obtained, the 

 following table may of service: 



Percentages of sulphur, sodium, and sulphated ash properly belonging to each of the seven 



permitted colors. 



i lodin in No. 517=57.7 per cent. 



Detailed analytical data obtained on several samples of each of the permitted colors (per cent). 

 GREEN TABLE NO. 4. NAPHTHOL YELLOW S. 



Serial Nos. 



