The Dupont de Nemours Chemical Co., of Wilmington, Del. Lists of the Best Dyestuffs, in the Different Classes, Made Thus Far by the American Manufacturers At the present moment, November, 1917, but few of the home-made colors are as fast to light as the specially selected dyes of the great German houses, listed on pages 66, 89, 103 and 127. Those in the following lists are the best made at present, in the United States, and will be steadily improved upon as time goes on. _Direct Cotton or Salt Dyes._— American—Benzo Fast Yellow, A Direct Sky Blue Marden— Stilbene Yellow Direct Blue Direct Brown National—Delta Red, 2 B Niagara Fast Yellow, F Niagara Blue, 2 B Erie Black, G X OO _Sulphur Colors._— Marden— Sulphur Black Sulphur Brown National—Sulphur Brown, W F Sulphur Yellow, B W Sulphur Direct Navy Blue Sulphur Black, F conc. _Vat Colors._— Dibrom Indigo, powder and paste Synthetic Indigo, 20% paste _Made by the Dow Chemical Company of Midland, Michigan. New York Agents, Geisenheimer & Co., 134 Cedar Street._ Synthetic Indigo and Sodium hydrosulphite can also be obtained from _Klipstein, 634 Greenwich Street, New York_. _Basic Colors._— Many of these such as Methylene Blue, Methyl Violet, Phosphine, Bismarck Brown and others, including leather Black, are being made by _American_, _Marden_ and _National_, as well as by many firms that so far have not gone into the general color business. One of the most important of these last, who, besides the above, make a brilliant basic Green, called by them Methylene Green, is the _Meth-O-Lene Co., Inc., 81-83 Fulton Street, New York_. Auramine, at present, can best be obtained from _Klipstein_. Nigrosine soluble in water, in jet black and bluish shades, is made by _Marden_, _Meth-O-Lene_ and other firms, and is largely used for dyeing leather fast brilliant shades of black. _Acid Colors._— American—Fast Yellow, H Ex. Brilliant Blue, conc. Cloth Red, H Acid Black, L conc. Marden— Metanril Yellow Orange, No. 2 Fast Acid Red Croceine Scarlet National—Azo Yellow, A S W Scarlet, B R Acid Black, 4 A B Also Tartrazine, a fast acid yellow much used for wool, not for silk. SPECIAL NOTE Further information concerning dyestuffs, apparatus, textiles, chemicals, etc., connected with this work, may be obtained on writing to the author at 7 West 43rd Street, New York. INDEX There is no mention either of the Plate illustrations or of the Figure illustrations in the index; these may be found in a list of the illustrations in the front of the book. Acid Azo Colors, 123, 124 Acid Colors, 52, 54, 123-131, 131-136, 148-150, 152, 165-168, 219, 258