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Updated: July 13, 2025
"I know there is not anything like Salt to destroy Weeds" was part of a long and rambling letter on blueruled tabletpaper, "In the June of 1926 or 7 I cannot remember exactly it may have been 28 I accidentally dropped some Salt on a beautiful Plumbago...."
Lilac plumbago, red hybiscus, and golden allemanda mingle with pink and purple lantana, yellow daisies, and hedges of scarlet tassels, enclosing wicker huts in patches of banana and cocoanut.
Black-lead pencils made here have acquired a national repute: the plumbago of which they are manufactured is extracted from "the bowels of the earth," at a mine in Borrowdale. The parish church, dedicated to St. Kentigern, is an ancient structure standing alone, about three-quarters of a mile distant, midway between the mountain and the lake.
"Greater works than these that I do shall he do who believeth on me," says the Greatest Worker. Great profit incites to do the work noted below. Carbon as charcoal is worth about six cents a bushel; as plumbago, for lead pencils or for the bicycle chain, it is worth more; as diamond it has been sold for $500,000 for less than an ounce, and that was regarded as less than half its value.
As many as fifteen boars have been accounted for in a couple of days' shooting. The sun went down; the soft air grew colder: we walked quickly back through the outskirts of Tangier, between gardens full of plumbago, dituria, geraniums, hibiscus, pointsettias, narcissus, frescia, and roses of all sorts, besides other flowers.
Principal Mineral Substances discovered in France. Dolomite in the mountains of Vosges and in the Pyrenees. Carburet of iron or plumbago, in the south peak of Bigorre. The same variety has been been found near Argentiere, and the valley of Chamouny, department of Mont-Blanc. A rock of the appearance of porphyry, with a calcareous base, in the same valley of Chamouny.
Mr. Maskelyne, having examined many of the margins of the folio with the microscope, confirms entirely the evidence of Mr. Hamilton's eyes. He found the pencilled memorandums "plentifully distributed down the margins," and "the particles of plumbago in the hollows of the paper" in every instance that he has examined.
The Japanese Mining Law, it may be interesting to relate, recognises the following minerals and mineral ores, which may accordingly be taken as existing in the country: Gold, silver, copper, lead, tin, hematite, antimony, quicksilver, zinc, iron, manganese and arsenic, plumbago, coal, kerosene, sulphur, bismuth, phosphorus, peat.
As a matter of fact, powdered carbon and plumbago had been used in making small adjustable rheostats by M. Clerac, in France, and probably also in Germany, as early as 1865 or 1866. Clerac's device consisted of a small wooden tube containing the material, and fitted with contacts for the current, which appear to have adjusted the pressure.
From them papier maché impressions are taken and bent into a curve, so that the casts made from them will fit the cylinders of the printing presses. In electrotyping, an impression is taken from the die in wax or gutta percha. The surface of this impression is coated with powdered plumbago.
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