6 CONTENTS. 



Page. 



IX. Compilation under the Green Table numbers of all information avail- 



able as to the suitability of coal-tar colors for food 



General statements 



Classification of opinions in literature and in legal enactments showing 



condition of the market in 1907 



Classification according to chemical composition and suitability 



Physiological action of coal-tar dyes 



Summary of symptoms 



Experiments on dogs 



Experiments on human beings 



Experiments on small animals 



General statements 



Complete detailed statement of all combined data 71 



Abbreviations of authorities cited 74 



Tabulation by Green Table numbers of physiological and other data 11 



Alphabetical index of trade names of coal-tar colors 148 



X. Dosage and symptoms 153 



Confectioner's list as a basis for a rule 153 



Lehmann's rules 158 



Santori's work as a guide to a rule 158 



Young's rule 15S 



XI. Oil-soluble or fat colors 15 



XII. Rules and reasons for selecting the seven colors permitted by F. I. D. 76. . 161 



Statement of rules 161 



Analysis of three recommendations made to the Department of Agri- 

 culture 162 



Process of elimination 166 



Reasons for adding Ponceau 3R 167 



Quality, cleanliness, and efficiency 169 



Xin. Lists of colors subsequently recommended by individuals and asso- 

 ciations 169 



Ernst 170| 



Muttelet's interpretation of the French law 17l| 



Second International White Cross Congress 1721 



Beythien and Hempel 173J 



Summary of three preceding recommendations 1741 



Unpublished recommendations of a manufacturer 177j 



Be"hal 177| 



Conclusions 178 



XIV Chemical examination of the seven permitted colors, 1907 179 



Need of chemical control 179 



First methods of analysis used 181 



Moisture 182 



Chlorin as chlorids 182 



Sulphated ash 182 



Total sulphur 183 



Gutzeit test 183 



Heavy metals 183 



Total insolubles 184 



Ether extractive 184 



Results of chemical examination, 1907 184 



Detailed chemical data on each permitted color 184 



Recalculation of analytical data on basis of coloring matter pres- 

 ent 187 



Market quality of the seven permitted colors 190 



