IDENTITY OF COAL-TAR COLORS, 1907. 



19 



It would, therefore, seem to be rather clear that others think more 

 favorably of such ex-patented products as food colors than do the 

 original patentees. In view of the fact that the latter would generally 

 be in a better position, and would have greater opportunity than any 

 ;nne else to judge of the suitability of the patented products for use 

 in food products, it may well be inferred that such products are not 

 altogether free from disadvantages as food colors. 



The second of the two questions propounded, namely, If restricted 

 I to such coal-tar colors as are now in use in the United States for this 

 purpose, would this be likely to hamper or interfere with the invention 

 of further coal-tar colors suitable for the coloring of food products? 

 can be answered "No" because none of the colors submitted was 

 [mscovered later than 1891; out of the 214 coal-tar colors since then 

 ipiscovered not one was among those submitted for use in foods, and 

 put of the 481 discovered in 1891 and prior thereto, only 74 were so 

 submitted, or 2 out of every 13 of such colors. In the following 

 table these data are given year by year: 



Coal-tar colors discovered from 1740 to 1891. 



SHADES OF COLOR. 



The sufficiency of the 74 colors used for food-coloring purposes in 

 ihe United States, for any and all tinctorial ranges, no matter how 

 refined, appears from the following table: 



jreen Table numbers of the 74 submitted colors showing shades and number of sources 



supplying each. 



