<div class="description">
<dl><dd>"Issued February 10, 1912."</dd>
<dd>At head of title: U.S. Department of Agriculture, Bureau of Chemistry</dd>
<dd>Introduction : Purpose of the investigation -- Number of colors permitted -- Quality and efficiency of colors permitted. pp. 9</dd>
<dd>1. Identity of coal-tar colors used in food products in the United States in 1907. pp. 15</dd>
<dd>2. Purposes of food coloring. pp. 23</dd>
<dd>3. Food color requirements. pp. 25</dd>
<dd>4. Conformity of food color market, 1907, to recommendations of the National Confectioners' Association, 1899. pp 30</dd>
<dd>5. Some legal enactments relative to the use of coal-tar dyes. pp. 35</dd>
<dd>6. Recommendations by associations and individuals as to use of coal-tar dyes as food colors. pp. 42</dd>
<dd>7. Recommendations made by United States color industries and trades to the Department of Agriculture. pp. 47</dd>
<dd>8. Investigations, other than on animals, bearing on the harmfulness of coal-tar colors. pp. 51</dd>
<dd>9. Compilation under the Green Table numbers of all information available as to the suitability of coal-tar for food. pp. 56</dd>
<dd>10. Dosage and symptoms. pp. 153</dd>
<dd>11. Oil-soluble or fat colors. pp. 159</dd>
<dd>12. Rules and reasons for selecting the seven colors permitted by F.I.D. 76. pp. 161</dd>
<dd>13. Lists of colors subsequently recommended by individuals and associations. pp. 169</dd>
<dd>14. Chemical examination of the seven permitted colors, 1907. pp. 179</dd>
<dd>15. Guides in determining degree of purity and cleanliness. pp. 192</dd>
<dd>16. Analyses of certified lots of permitted colors, 1909-10. pp. 198</dd>
<dd>17. Methods of analysis used in testing colors for certification. pp. 210</dd>
<dd>18. Addenda. pp. 225</dd>
<dd>19. Index of authorities quoted. pp. 227</dd></dl><br>Subjects: Coal-tar colors; Coloring matter in food</div>
<div class="fn value">
<dl><dd>Hesse, Bernhard Conrad, b. 1869</dd>
<dd>United States. Bureau of Chemistry</dd>
<dd>United States. Department of Agriculture</dd></dl></div>
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