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Updated: May 26, 2025
Not only have these to be utilised, but they have first to be obtained some by the growth of timber, others by mining, then by the heat of the furnace, then by hammer and workman, then by the chemist and colour-maker, then by the maker of the toy many of these employed at large wages; and yet you receive for your children an article which not only gives instruction, but the greatest amusement, all for one penny.
Indigo is such a dye, and so are Magenta, Aniline Black, Aniline Violet, picric acid, Ultramarine Blue, and so on. Ultramarine is not, it is true, confined to blue; you can get Ultramarine Green, and even rose-coloured Ultramarine; but still, in the hands of the dyer, each shade remains as it came from the colour-maker, and so Ultramarine is a monogenetic colour.
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