The Secretary of the Interior or any duly authorized representative shall be entitled to admission to, and to require reports from the operator of, any metal or nonmetallic mine which is in a State ( excluding any coal or lignite mine ), the products of which regularly enter commerce or the operations of which substantially affect commerce, for the purpose of gathering data and information necessary for the study authorized in the first section of this Act.

Another recent achievement was the successful development of a method for the complete combustion in a bomb calorimeter of a metal in fluorine when the product is relatively non-volatile.

Even here there is room for some variation, for metal surfaces vary in smoothness, absorptive capacity, and chemical reactivity.

Each teacher has in his classroom a metal file, equipped with a lock, which is used to store cumulative record folders.

Preparation of a coordination compound is often accomplished by the simple method of reacting a metal salt with a ligand in a suitable solvent such as an alcohol.

Particular interest is directed towards the condensation of these ligands with metal halides to form substituted phosphide or arside complexes.

Make sure that the metal tube through which the wire passes is in the shape of an inverted `` L '', the foot of the `` L '' about three inches long, so that the puppet can hang directly under the light.

Made of gold-plated britannium on a black metal base, it is 13. 5 in ( 34 cm ) tall, weighs 8. 5 lb ( 3. 85 kg ) and depicts a knight rendered in Art Deco style holding a crusader's sword standing on a reel of film with five spokes.

In the modern IUPAC nomenclature, the alkali metals comprise the group 1 elements, excluding hydrogen ( H ), which is nominally a group 1 element but not normally considered to be an alkali metal as it rarely exhibits behaviour comparable to that of the alkali metals.

Experiments have been conducted to attempt the synthesis of ununennium ( Uue ), which is likely to be the next member of the group, but they have all met with failure .< ref name =" link "> However, ununennium may not be an alkali metal due to relativistic effects, which are predicted to have a large influence on the chemical properties of superheavy elements.

Antimony is a silvery, lustrous gray metal that has a Mohs scale hardness of 3.

Metallic antimony is a brittle, silver-white shiny metal.

Americium is a relatively soft radioactive metal with silvery appearance.

Astatine is sometimes described as being a black solid ( assuming that it follows this trend ), or as having a metallic appearance ( if it is a metalloid or a metal ).

Steel is a metal alloy whose major component is iron, with carbon content between 0. 02 % and 2. 14 % by mass.

Alloying a metal is done by combining it with one or more other metals or non-metals that often enhance its properties.

The term alloy is used to describe a mixture of atoms in which the primary constituent is a metal.

The primary metal is called the base, the matrix, or the solvent.

When a molten metal is mixed with another substance, there are two mechanisms that can cause an alloy to form, called atom exchange and the interstitial mechanism.

With the interstitial mechanism, one atom is usually much smaller than the other, so cannot successfully replace an atom in the crystals of the base metal.

These defects are created during plastic deformation, such as hammering or bending, and are permanent unless the metal is recrystallized.

While the use of iron started to become more widespread around 1200 BC, mainly because of interruptions in the trade routes for tin, the metal is much softer than bronze.

The pieces are carefully heated with exclusion of air and then compressed into a uniform mass by intense hydraulic pressure ; the softened amber being forced through holes in a metal plate.

In Southeast Asia, in the first millennium, documents of sufficiently great importance were inscribed on soft metallic sheets such as copperplate, softened by refiner's fire and inscribed with a metal stylus.

The heated portion of the metal is softened by this process, leaving the edge at the higher hardness.

The first element of the name is mąs, " iron, metal, ax ," which before a consonant may be softened to mąza-or mąze -, although the free standing form mąz is also known.

It works by mechanically intermixing the two pieces of metal at the place of the join, transforming them into a softened state that allows the metal to be fused using mechanical pressure, much like joining clay, dough, or plasticine.

Copper was the first metal in common use for tools and containers since it is one of the few metals available in non-oxidized form, not requiring the smelting of an ore. Copper is easily softened by heating and then cooling ( it does not harden by quenching, as in cool water ).

Compression molding is a forming process in which a plastic material is placed directly into a heated metal mold, then is softened by the heat, and forced to conform to the shape of the mold as the mold closes.

In order to bend the frame, the wood (" buka ", " orev ") may be softened in water before being bent around a hot metal cylinder.

It is produced by polishing the metal with a 120 – 180 grit belt or wheel finish and then softened with an 80 – 120 grit greaseless compound or a medium non woven abrasive belt or pad.

With the metal shutters closed, the dining room was so dark that it seemed still night in there.

Abated, an ancient technical term applied in masonry and metal work to those portions which are sunk beneath the surface, as in inscriptions where the ground is sunk round the letters so as to leave the letters or ornament in relief.

It is hard and brittle, and it was particularly significant in antiquity, so much so that the Bronze Age was named after the metal.

Sheet metal or boards are used to route the airflow through the brick lattice so that fresh air flows first through the recently burned bricks, heating the air, then through the active burning zone.

In bulk form ( typically as chips or " turnings "), the metal is somewhat difficult to ignite, more so even than magnesium chips ; but, when lit, the metal burns in air with a brilliant high-intensity orange-red light.

However, metallic bonds are more collective in nature than other types, and so they allow metal crystals to more easily deform, because they are composed of atoms attracted to each other, but not in any particularly-oriented ways.

In many classical sites, sectioned columns were carved with a centre hole or depression so that they could be pegged together, using stone or metal pins.

In forward operation, a surrounding metal electrode called the anode is positively charged so that it electrostatically attracts the emitted electrons.

They all must be properly aligned, they must be designed so the metal and the flash will flow properly and fill all the grooves, and special considerations must be made for supporting webs and ribs and the parting line location.

Later, the barrel was changed to be made of metal, so that a more explosive gunpowder could be used and put more force into the propulsion of the projectile.

A metal rotor consisting of windows and tabs is mounted to a shaft and arranged so that during shaft rotation, the windows and tabs pass through the air gap between the permanent magnet and semiconductor Hall chip.

The Golden Age was infinitely superior to the present age, an age so corrupt there is not even an appropriate metal to name it.

It was an acoustic archtop fitted with a guitar pickup, which sensed the vibrations in the metal strings so that they could be amplified by a guitar amplifier.

She does so by ascending on a flying tire until she reaches a structure resembling clouds, into which she disappears, although in the film version of Cats she ascends with Old Deuteronomy and then she walks up a giant metal hand to the Heaviside layer.

It is the lightest metal in the periodic table, so light that it can float on water and even on oil, and it is one of three metals that can ( the other two are sodium and potassium ).

The annealing process softens the metal by heating it and then allowing it to cool very slowly, which gets rid of stresses in the metal and makes the grain structure large and soft-edged so that when the metal is hit or stressed it dents or perhaps bends, rather than breaking ; it is also easier to sand, grind, or cut annealed metal.

This means that inside the metal one can generally not distinguish molecules, so that the metallic bonding is neither intra-nor intermolecular.