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Updated: June 10, 2025
There is another point that needs good heed taking to, namely, in using different coal-tar colours to produce some mixed effect, or give some special shade, the colours to be so mixed must possess compatibility under like circumstances.
Mix the two together and knead them well with water into a stiffish paste. Then wrap this pudding in a cloth, and put another cloth about it, which has been smeared with common or coal-tar. Dig a hole in some quiet corner of your garden, pop your dumpling into it, and cover it well up with earth, treading it down firmly with your feet.
But too often, murky-looking wharfs, storehouses, and half-dismantled ships, are enveloped in drizzling fog the fog rendered yet more impenetrable by the fumes of coal-tar and sawdust; and the lower streets swarm with a demoralised population. Yet the people of St. John are so far beyond the people of Halifax, that I heartily wish them success and a railroad.
Why would it not do just as well to tempt electricity out of its hiding-hole with plates or slices of cheese and bread, placed one after the other in a trough filled with a mixture of glue and melted butter?" "What stuff you do talk, Madge! As well might you ask why it would not do to make a plum-pudding out of nutmegs and coal-tar.
But they soon found out that this same "coal-tar" was very good to eat, and that I had brought a quantity of it. One day when I was spreading a sea-biscuit thick with it for a wide-awake youngster, I heard them whisper, "Chut-chut!" meaning that a shark had bitten my hand, which they observed was lame.
In a summary of certain war activities of the National Health Insurance Commission, we read: "It was chiefly in the making of the coal-tar synthetic remedies that Germany was pre-eminent, and that position was due not to any lack of skill or invention on the part of the British chemists, but to the high degree of organisation attained by the German chemical industry, which made it possible to convert the by-products of the aniline factories into medicaments of high therapeutic and commercial value."
But they worked rather slow and talked very fast, and seemed in anything but a good humor. All their noses upwardly projected from their faces like so many jib-booms. Now and then pairs of them would drop their work, and run up to the mast-head to get some fresh air. Some thinking they would catch the plague, dipped oakum in coal-tar, and at intervals held it to their nostrils.
The best proportions for the indigo-vat are, for cloth dyeing, 4000 parts of water, 40 of indigo, 60 to 80 of copperas crystals, and 50 to 100 of dry slaked lime. The usual plan is to put in the water first, then add the indigo and copperas, which should be dissolved first, and finally to add the milk of lime, stirring all the time. Artificial indigo has been made from coal-tar products.
On old wood, no longer active, creosote is good, perhaps followed by coal-tar. Usually, however, paint is quite sufficient. Small exposures usually receive no dressing. When the fresh surface wood is exposed by removal of bark, it is necessary to keep the tissue from drying out, and antiseptics are usually not applied.
But, coal distilled at lower temperatures, as well as shale, as in Scotland, will yield tar, but tar of another kind, from which colour-generating substances cannot be obtained practically, but instead, paraffin oil and paraffin wax for making candles, etc. Coal-tar contains a very large number of different substances, but only a few of them can be extracted profitably for colour-making.
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