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"Not necessarily so. In the case of brass it is true. This is made by uniting two parts of copper and one of zinc. Both copper and zinc in themselves are very soft, and copper cannot well be polished in its pure state. Brass, however, is not only much harder, but is susceptible of a very fine polish." "Are the alloys of all metals harder than the metals of which they are made?"

It is of course obvious that for most chemical operations, and especially in the field of metallurgy, heat is required for the separation of combinations of various elements, for their purification, as well as for the combination with other elements into alloys or compounds of direct utility.

No; these are alloys, and great ones too, which can never adorn any character, but will always debase the best. To prove this, suppose any man, without parts and some other good qualities, to be merely a whoremaster, a drunkard, or a gamester; how will he be looked upon by all sorts of people? Why, as a most contemptible and vicious animal.

In England alone is the pervading atmosphere of respectability that which artists breathe in common with all other men respectability, that English moral climate, with its neutral tint and temperate tone, so often sneered at in these days by its new German title of Philistinism, so often deserving of the bitterest scorn in some of its inexpressibly mean manifestations respectability, the pre-eminently unattractive characteristic of British existence, but which, all deductions made for its vulgar alloys, is, in truth, only the general result of the individual self-respect of individual Englishmen; a wholesome, purifying, and preserving element in the homes and lives of many, where, without it, the recklessness bred of insecure means and obscure position would run miserable riot; a tremendous power of omnipotent compression, repression, and oppression, no doubt, quite consistent with the stern liberty whose severe beauty the people of these islands love, but absolutely incompatible with license, or even lightness of life, controlling a thousand disorders rampant in societies where it does not exist; a power which, tyrannical as it is, and ludicrously tragical as are the sacrifices sometimes exacted by it, saves especially the artist class of England from those worst forms of irregularity which characterize the Bohemianism of foreign literary, artistic, and dramatic life.

The ship was to retain its natural metallic sheen, the only protection being a coat of "passivity paint" a liquid chemical that could be brushed or sprayed on iron, chromium, nickel or cobalt alloys, rendering them passive to practically all chemical agents.

Solid platinum! This whole planet is built of platinum, iridium, and noble alloys the only substances known that will literally last forever. Believe me, ace of my bosom, I don't wonder that it cost them lives to build it with their conditions, I don't see how they ever got it built at all."

Joule and Lyon Playfair showed, in 1846, that metals in different allotropic states possess different atomic volumes, and Matthiessen, in 1860, was led to the view that in certain cases where metals are alloyed they pass into allotropic states, probably the most important generalization which has yet been made in connection with the molecular constitution of alloys.

In reference to the making of alloys these metal workers showed considerable ingenuity, the alloys used, amalgams of gold, silver, copper, and other metals in deft proportions, resulting in magnificent effects as regards ornamentation and permanency.

The Ducomet pyrometer is on a very different principle, and only applicable to rough determinations. It consists of a series of rings made of alloys which have slightly different melting-points. These are strung upon a rod, which is pushed into the medium to be measured, and are pressed together by a spiral spring.

The practitioners of the Sacred Art of Egypt must have been acquainted with many operations which we now class as belonging to applied chemistry; witness, their jewellery, pottery, dyes and pigments, bleaching, glass-making, working in metals and alloys, and their use of spices, essential oils, and soda in embalming, and for other purposes.