162 



COAL-TAR COLORS USED IN FOOD PRODUCTS. 



Rule III. All coal-tar colors which have been examined physiologi- 

 cally and have been declared to be of doubtful harmlessness shall not 

 be permitted for use in foods. 



Rule IV. Only those coal-tar colors whose chemical composition 

 was definitely disclosed or otherwise ascertained, and which were on 

 the United States market in the summer of 1907, and which have 

 been examined physiologically and with no other than a favorable 

 result shall, for the present, be permitted for use in foods. 



ANALYSIS OF THREE RECOMMENDATIONS MADE TO THE DEPART- 

 MENT OF AGRICULTURE. 



These rules were formulated as a guide in view of the divergent 

 opinions expressed in three different recommendations to the Depart- 

 ment of Agriculture. One of these recommendations suggested that 

 permitted colors be designated by nine titles. Comparison of these 

 titles with the Green Tables and with the tabulated survey of the unfa- 

 vorable, favorable, and contradictory literature corresponding to the 

 Green Table numbers (p. 63) discloses the following facts: 



Comparison of nine suggested color titles with corresponding Green Table numbers and 



the reports on the same. 



i Of physiological tests in literature compiled. 



Therefore, under 9 titles 36 diiYerent chemical individuals would 

 be placed upon the permitted list, of which only 8, or less than 25 per 

 cent, have been examined physiologically with only favorable 

 results, and 28, or more than 75 per cent, had either not been examined 

 at all physiologically or with contradictory results. 



