15 16 22 27 Durability and Weight of Furs for Rugs and Foot-sacks.
All yield a soft, easily-worked timber, which, though very perishable when exposed to weather, possesses sufficient durability when kept dry to give the trees a certain economic value.
The wood is hard, heavy and of fine grain, quite equal to the best British oak for indoor use, but of very variable durability where exposed to weather.
Their permanence depends not upon their importance, but upon the durability of the substance on which they are inscribed.
But a limit is put to th~ diminution of the radii of journals and pivots by the conditions 01 durability and of proper lubrication, and also by conditions 01 strength and stiffness.
Given a certain allowable heat transmission, the principal points to be considered in connexion with insulation are, first cost, durability, weight and space occupied, the two last named being specially important factors on board ship. No exact rules can be laid down, as the conditions vary so greatly; and though experiments have been made to determine the actual heat conduction of various materials per unit of surface, thickness and temperature difference, the experience of actual practice is at present the only accepted guide.
The principal supply is in West Rutland, Proctor and Pittsford; this, the "Rutland marble," is a duller, less lustrous white, and of a greater durability than the Carrara marble, and is used largely for monuments and statuary.
Metals were used for money at an early stage of civilization, and are well suited to the purpose, owing to their great intrinsic value and their durability, indestructibility, divisibility and rarity.
The Concord granite is a medium bluish-grey coloured muscovitebiotite granite, with mica plates so abundant as to effect the durability of the polish of the stone; it is used for building-the outer walls of the Library of Congress at Washington, D.C., are made of this stone-to a less degree for monuments, for which the output of one quarry is used exclusively, and for paving blocks.
These weirs, if solidly constructed, possess the advantages of simplicity, strength and durability, and require no superintendence.
Comparative Durability of Various Furs and Weight of Unlined Skins per Square Foot.
Motoring or driving coat, full length Weight and Durability of Furs for Men's Coat Linings.
Some of these, such as the lapacho and quebracho, are of rare excellence and durability, as is shown by the wonderful state of preservation in which the woodwork of early Jesuit churches still remains.
In many cases, however, the groups point to the existence of some boss of rock of greater durability than those in the immediate neighbourhood, as in the Cuchullins and Red Hills of Skye and the group of granite cones of Ben Loyal, Sutherland.
In beauty, durability and delicacy of surface it is very inferior to bronze, and, though of some commercial importance, has been of but little use in the production of works of art.
Modern smelters carefully extract this silver from the lead ore, thereby greatly impairing the durability and beauty of the metal.
Iron-wood, remarkable for the durability of its timber, is abundant; it is used by the natives for the pillars of their homes and forms an article of export, chiefly to HongKong.
Its specific lightness, combined with strength and durability, recommend it above all other substances for forming life-buoys, belts and jackets, and in the construction of life-boats and other apparatus for saving from drowning.
Most woods in durability, and none stand better alternate exposure to drought and moisture, while under cover it is nearly indestructible as long as dry-rot is prevented by free admission of air.
It forms extensive forests in Vancouver Island, British Columbia and Oregon, whence the timber is exported, being highly prized for its strength, durability and even grain, though very heavy; it is of a deep yellow colour, abounding in resin, which oozes from the thick bark.
Its carpets have a great reputation in the Balkan Peninsula for their quaint designs, durability and freshness of colour.
The superior beauty of colour and durability of old specimens of lead is owing to the natural presence of a small proportion of silver.
Owing to its durability the wood was employed for mummy cases, and images of the gods; .....
In addition to its brilliance, vermilion is a pigment of great intensity and durability, remaining unaffected by acid fumes.
It consists largely of a dark brown or black sandy loam, finely comminuted, the richness of which in organic matter and mineral salts induces rapidity of growth, and the strength and durability of which render it capable of a long succession of crops.
As the durability of the electro-deposited coat on plated wares of all kinds is of the utmost importance, the greatest care must be taken to ensure its complete adhesion.
Hardness and Chemical Stability.-These properties contribute to the durability of lenses, and are specially desirable in the outer members of lens combinations which are likely to be subjected to frequent handling or are exposed to the weather.
Concrete may be compared with other building materials like masonry or timber from various points of view, such as strength, durability, convenience of building, fire resistance, appearance and cost.
In regard to durability good Portland cement concrete is one of the most durable materials known.
Values have greatly increased, and the fur possessing good qualities as to colour and durability will doubtless always be in good request.
The preparation of seal skin occupies a longer time than any other fur skin, but its fine rich effect when finished and its many properties of warmth and durability well repay it.