Permanence by virtue of the power to resist stress or force

Usage examples of durability.

The author exhibited a series of eighteen inks which had either been made with metallic iron or with which metallic iron had been immersed, and directed attention to the fact that though the depth and body of color seemed to be deepened, yet in every case the durability of writings made with such inks was so impaired that they became brown and faded in a few months.

It was shown that no gall and logwood ink was equal to the pure gall ink in so far as durability in the writings was concerned.

Sugar was shown to have an especially hurtful action on the durability of inks containing logwood--indeed, on all inks.

The myrabolams was recommended as an ink of some promise for durability, and as the cheapest ink it was possible to manufacture.

All ordinary inks, however, were shown to have certain drawbacks, and the author endeavored to ascertain by experiment whether other dark substances could be added to inks to impart greater durability to writings made with them, and at the same time prevent those chemical changes which were the cause of ordinary inks fading.

He therefore recommended that all legal deeds or documents should be written with quill pens, as the contact of steel invariably destroys more or less the durability of every ink.

A steel pen during use injures, and often greatly, the durability of a writing ink by giving up iron to it.

Assuming this character of ink to have been employed in past centuries, the cause or causes for the differentiations in respect to color and durability become of paramount importance.

The longer these latter conditions obtain the longer will the ink retain its pristineness, its durability and permanence.

In the precipitate an excess of colouring matter, which is necessary for its durability, is preserved in it.

Thus, when easily obtained, aside from the greater advantages of their durability, stone is as cheap in the first instance as lumber, excepting in new districts of country where good building lumber is the chief article of production, and cheaper than brick in any event.

It is, in fact, a strong argument in favor of bricks in building, where they can be had as cheap as stone or wood, that any color can be given to them which the good taste of the builder may require, in addition to their durability, which, when made of good material, and properly burned, is quite equal to stone.

This would save the expense of paint, or wash of any kind, besides the greater character of durability and substance it would add to the establishment.

I do not mean to be understood that, for the sake of the first cost, we should pay no regard to the appearance, or that we should slight our work, or suffer it to be constructed of flimsy or perishable materials: we should not only have an eye to taste and durability, but put in practice the most strict economy.

Yet, there is a substance and durability in them, that is exceedingly satisfactory, and, where the pecuniary ability of the farmer will permit, may well be an example for imitation.