336 ANNUAL, RBtPORT OF THE Off. Doc. 



my laboratory about two hundred and tifty of these colors, and 

 durii!.u the past year I have made a very careful analysis of about 

 two liuiidred of them. As a witness on the stand, I am often 

 asked do I find coal tar there. Lawyers often confuse coal tar color 

 with cual tar. Now, they might just as well ask if we find any 

 potatoes in Irish whiskey, which is made from potatoes, as to ask 

 if we find coal tar in coal tar colors, because coal tar bears ukj 

 more resemblance to it than it does to the air and soil from which 

 it is derived. Coal tar is a large subject, and if you will bear with 

 me just a moment, I will call attention to just a few of the products 

 derived from coal tar, in a general way. 



If we put coal tar in a retort, and subject it to heat, there results, 

 from this distillation an ammoniacal article, the water of whicV 

 contains considerable ammonia. Then there comes a substanci 

 which is known as Carbolic Acid Phenol. A little later come tht 

 heavier oils, and- then the solid, as you see in that bottle, known aa 

 Naphthaline; from it is derived the Moth Tar Marbles, sometimes 

 called Tar Camphor. There is one component that is white; it i& 

 known as anthracine; the other products leave the retort as what 

 is known as Coal Tar Pitch, a product which is a hard, solid, brittle 

 black mass. This is mixed with some of the products of coal tai 

 and makes a roofing paint, and the difference between it and coai 

 tar is that some of the water which causes it to absorb in ^h'^ 

 timbers has been removed. 



Now, we start in to get coal tar colors. Here is one of the colore, 

 a red coal tar color, which is often found mixed with the gluten 

 feeds. As I have said, they are exceedingly numerous, and are all 

 colors and shades of colors, so that nearly every colored article of 

 wearing apparel is colored with one of these coal tar products. 

 They have taken the place completely of the vegetable and animal 

 colors. 



Now, as to the use of coal tar colors in foods. Many of our foods 

 have no color, and sometimes, when they have, the color is not so 

 decided as we would like to have it, therefore the color is made by 

 the addition of a little coal tar color that will give a similar hue 

 to the article, but of greater intensity than the article would natur- 

 ally have. Just a few of these I have brought with me, and want 

 to show you. Here is one sheet on which there are some pieces of 

 wool which were white, but which were colored with coal tar 

 colors that have been extracted from food substances. The first 

 one to my extreme left was extracted from cranberry sauce. It 

 seems that in this particular instance the cranberry sauce did not 

 have as high a color as they wanled it to have, so they colored it 

 with coal tar products, and a little of that color dyed into this 

 piece of wool, is what you have right here. 



You know that in the markets of the State are bakers' supply 

 houses, where bakers can go and obtain almost any t"hing they 

 want. A sample of huckleberry pie filler was taken from one of 

 these bakers' supply houses, and here is a piece of wool dyed with 

 the coal tar color which was extracted from a small amount of 

 huckleberry pie filler. Huckleberries are usually of a very dark 

 color, and they should have color enough in themselves, but in 

 this particular instance, it appears they lacked the necessary color, 

 and it was supplied by coal tar dye. 



