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Updated: June 3, 2025
The application of asphaltum, what is known as "grade D," has been also used to some extent in the Santa Clara valley without injury. Of course, in the use of any black material, you increase the danger of sunburn, if applied to bark which is reached by the sun's rays. Whitewashing Fruit Trees. When is the proper time to whitewash walnut trees to prevent sun scald?
A wire ran from the clockwork to one of the poles of the battery, and from the other pole through the partition into the other compartment, a second wire returning directly to the clockwork. Whatever lay within the second compartment was not visible, for a cover lay over it and appeared to be sealed in place by asphaltum.
Five of these great thoroughfares radiate from one ample centre a centre which is exceedingly well adapted to the accommodation of heavy artillery. The mobs used to riot there, but they must seek another rallying-place in future. And this ingenious Napoleon paves the streets of his great cities with a smooth, compact composition of asphaltum and sand.
Thus petroleum may separate from the gas as asphaltum separates from petroleum. But some speculative minds consider natural gas to be a product of anthracite coal.
She therefore, carefully preserves these precious bottoms of her broken ollas, even cementing together fractured ones, when not too badly shivered, with a mixture of pitch or mineral asphaltum and sand.
The oil as it comes from the ground is usually brownish or greenish in color, and much thicker than the refined product which we use in our lamps. Some of the crude petroleum is thick and tar-like in appearance, and when long exposed to the air turns to a solid black mass called "asphaltum." This, when softened by heat and mixed with sand, makes a valuable material for street pavement.
It is true that asphaltum papers will always in a fresh state contain a small percentage of volatile ingredients, which after a while make it hard and friable upon the roof; but, by reason of its greater percentage of resinous components, it will always preserve a superior degree of durability and become far less porous. One hundred parts by weight absorb 140 or 150 parts by weight of coal tar.
And I have left the bones of my transient carcasses in pond bottoms, and glacial gravels, and asphaltum lakes. I have lived through the ages known to-day among the scientists as the Paleolithic, the Neolithic, and the Bronze. I remember when with our domesticated wolves we herded our reindeer to pasture on the north shore of the Mediterranean where now are France and Italy and Spain.
The whole city was placed upon an even and regular grade, the low places filled up, and the elevations cut down. Some ninety miles of the three hundred miles of half-made streets and avenues were graded and paved, some with wood and others with asphaltum.
One Eastern traveller brought to the Turkey Company six hundred weight of mummy broken into pieces. Adulteration came into play in a manner which would have gratified the Lancet commission: the Jews collecting the bodies of executed criminals, filling them with common asphaltum, which cost little, and then drying them in the sun, when they became undistinguishable from the genuine article.
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