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Updated: May 31, 2025
The chemical and mineral world furnish us with many instances of the growth and development of forms closely resembling the forms of the vegetable world. What is known as "metallic vegetation," as shown in the "lead tree," gives us an interesting example of this phenomenon. The experiment is performed by placing in a wide-necked bottle a clear acidulated solution of acetate of lead.
When the percolating acidulated water passes slowly through a pure limestone it is filtered of impurities and deposits a crystal, either pure white or transparent; if it comes in contact with metallic bodies of any kind, it carries away more or less in solution to act as coloring matter; the beautiful pale green onyx in several Missouri counties taking its tint from the copper; in South Dakota, manganese in various combinations produces black and many shades of brown; in both states an excessive flow of water often carries a quantity of red or yellow clay which temporarily destroys the beauty of exposed surfaces, but in after years becomes a fine band of brilliant color.
Give 10 grains of permanganate of potassium in a pint of water acidulated with sulphuric acid, and repeat the dose every half hour. Belladonna by mouth, or atropine hypodermically. Patient must be kept roused by dashing cold water over him, flagellating with a wet towel, walking about, etc.
Politics, indeed, according to their usual custom, sometimes rather acidulated his good humour; but anybody possessed of the noun, with the least allowance of the adjective, should be propitiated by the way in which the almost Radical reformer of Peter Plymley's Letters in 1807 became the almost Tory and wholly conservative maintainer of ecclesiastical rights in those to Archdeacon Singleton thirty years later.
The decomposition of his acidulated water is certainly a direct result of the current; but as the varied and important researches of MM. Becquerel, De la Rive, and others had shown, there are also secondary actions which may materially interfere with and complicate the pure action of the current.
The wild and haggard looks of my companions, their sunken eyes, and sallow, fleshless faces, too plainly showed that some subsistence must be speedily provided more nutritious than the unripe and strongly acidulated fruit presented to us. We drew lots, and the parson's horse was doomed; in a few minutes, his hide was off; and a part of the flesh distributed.
The wild and haggard looks of my companions, their sunken eyes, and sallow, fleshless faces, too plainly showed that some subsistence must be speedily provided more nutritious than the unripe and strongly acidulated fruit presented to us. We drew lots, and the parson's horse was doomed; in a few minutes, his hide was off, and a part of the flesh distributed.
"To think that I should ever have dared to offer this young lady acidulated drops!" he exclaimed on one occasion, when Hadria was looking flushed and perturbed. "Ah! shall I ever forget those acidulated drops!" she cried, brightening. "You don't mean to say that you would stoop to them now?" "It is not one's oldest friends who always know one best," she replied demurely.
The extreme zinc and copper plates, when joined by a wire, are found to deliver a current. This form of the voltaic, or, as it is sometimes called, galvanic battery, has given place to the "cell" shown in figure II, where the two plates Z C are immersed in acidulated water within the vessel, and connected outside by the wire W. The zinc plate has a positive and the copper a negative charge.
"No, it costs much less to grind it than to burn it," Percy replied. "Mills are used for grinding rock in cement manufacture, and the rock phosphate and bone meal must all be ground before using them either for direct application or for the manufacture of acidulated fertilizers; and limestone is not so hard to grind as some other rocks. Furthermore it does not need to be so very finely ground.
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