It is nothing you can put your fingers on but the air suddenly fills with a high charge of electricity.

Perhaps this is what gives the aborigine his odd air of dignity.

The street that is full now of traffic and parked cars then and for many years drowsed on an August afternoon in the shade of the curbside trees, and silence was a weight, almost palpable, in the air.

The information is furnished by each of the guests, is sent by oral broadcasting over the air waves, and is received by the ears.

Since the air is a continuum, the network of communication remains intact regardless of the positions or motions of the points ( the people ) in the net.

It is covered ( partly ) with water, air is atop of that.

It is generally conceded that the Formosan air force is the best by far in Asia, and the army the best trained.

A substantial increase is estimated in the cost of operating additional communications systems in the air defense program, as well as in all programs where speed and security of communications are essential.

The second capability is represented by our deployed ground, naval, and air forces in essential forward areas, together with ready reserves capable of effecting early emergency reinforcement.

If the target can change its position significantly during the 30 minutes the missile is in the air on its way, the probability of the missile destroying the target is drastically reduced.

Even if you live above that line, the FHA will back you, for they have decided that the inclusion of air conditioning in all new homes is a good thing and should be encouraged.

Best of all, central air conditioning is something you can afford.

No matter what style your home is, ranch, two-story, Colonial or contemporary, central air conditioning is easily installed.

But there's no denying that the easiest and most economical way to get year-'round whole-house air conditioning is when you build.

If your house is to have a forced warm air system, cooling can be a part of it.

It is, in effect, an oversize room conditioner equipped with prefab glass-fiber ducts to distribute the cooled, cleaned, dehumidified air where it is wanted.

A relatively simple switching arrangement reverses the cycle so that the machine literally runs backward, and the heat is extracted from outdoor air and turned indoors.

For example, bright sunlight is rapidly destructive for living microorganisms suspended in air.

It speared up into the air, then sinking back, the up-jutting branch turned slowly.

As you know, a conditioner makes indoor air cool by pumping the heat out of it and then releasing this heat outdoors.

He then pushes his seat into the air and the teacher guides it over.

It was then distilled at least three times from a trap at -78-degrees to a liquid air trap with only a small middle fraction being retained in each distillation.

When he turned into the highway that led to the outskirts of the city and then rose toward home, he had to pull over to the curb and wait for a few minutes, sucking in air and squinting and blinking his eyes to clear them of tears.

Instinctively he exhaled through his nose then sucked in the air from the hose.

These are then closed with valves and the air is forced into the lungs by contraction of the throat.

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.

116 .</ ref > When air condenses it becomes visible, as mist and then rain and other forms of precipitation, and as the condensed air cools Anaximenes supposed that it went on to form earth and ultimately stones.

Having concluded that everything in the world is composed of air, Anaximenes then used his theory to devise a scheme explaining the origins and nature of the earth as well as of the surrounding celestial bodies.

Once these projects have been approved by the United States Air Force or other agencies such as the CIA, and are ready to be announced to the public, operations of the aircraft are then moved to a normal air force base.

Thus if the instrument depends on the pressure or suction effect alone, and this pressure or suction is measured against the air pressure in an ordinary room, in which the doors and windows are carefully closed and a newspaper is then burnt up the chimney, an effect may be produced equal to a wind of 10 mi / h ( 16 km / h ); and the opening of a window in rough weather, or the opening of a door, may entirely alter the registration.

The air is passed through a spray of salt solution to dehumidify it, then through a spray of water solution to cool it, then another salt solution to dehumidify it again.

It was then decided to ban private air traffic over Central Berlin.

The male then engages in a " dance " flings various objects in the air and then jumps.

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.

With domestic news, the correspondent first records a " generic minute " summary ( for use by all stations and channels ) and then priority is to report on BBC Radio 5 Live, then on the BBC News Channel and any other programmes that are on air.

For foreign news, first a " generic minute " is recorded, then reports are to World Service radio, then the reporter talks to any other programmes that are on air.

Rainbows are formed when densely compressed air is touched by the rays of the sun .< ref > Fairbanks, Arthur.

There was a mighty hiss of compressed air from her tanks and the U-27 vanished from sight in a vortex of giant rumbling bubbles, leaving a pall of smoke over the spot where she had been.

In these areas the wave energy breaking against the cliffs is higher, and air and water are compressed into cracks in the rock, forcing the rock apart, breaking it down.

This is due to the turbocharger / supercharger already having compressed the fuel / air mixture considerably before it enters the cylinders.

In 1893 he described a " slow-combustion engine " that first compressed air thereby raising its temperature above the igniting-point of the fuel, then gradually introducing fuel while letting the mixture expand " against resistance sufficiently to prevent an essential increase of temperature and pressure ", then cutting off fuel and " expanding without transfer of heat ".

The diesel internal combustion engine differs from the gasoline powered Otto cycle by using highly compressed hot air to ignite the fuel rather than using a spark plug ( compression ignition rather than spark ignition ).

At about the top of the compression stroke, fuel is injected directly into the compressed air in the combustion chamber.

The heat of the compressed air vaporizes fuel from the surface of the droplets.

The vapour is then ignited by the heat from the compressed air in the combustion chamber, the droplets continue to vaporise from their surfaces and burn, getting smaller, until all the fuel in the droplets has been burnt.

Large and medium marine engines are started with compressed air directly applied to the pistons.

Electric motors convert electrical energy into mechanical motion, pneumatic motors use compressed air and others, such as clockwork motors in wind-up toys use elastic energy.

The fluid is then cooled, compressed and reused ( closed cycle ), or ( less commonly ) dumped, and cool fluid pulled in ( open cycle air engine ).

This air is compressed, mixed with fuel, ignited and expelled as the exhaust gas.

A pneumatic motor is a machine which converts potential energy in the form of compressed air into mechanical work.

Pneumatic motors generally convert the compressed air to mechanical work though either linear or rotary motion.

Hydraulic action takes place when air in a joint is suddenly compressed by a wave closing the entrance of the joint.

Nitrox is not a safer gas than compressed air in all respects ; although its use can reduce the risk of decompression sickness, it increases the risk of oxygen toxicity and fire, which are further discussed below.

* Pneumatic filter, a device which removes contaminants from a compressed air stream

In the laboratory, pressure in the form of compressed air on the feed side ( or vacuum on the filtrate side ) may be applied to make the filtration process faster, though this may lead to clogging or the passage of fine particles.

These were constructed with the aid of compressed air caissons and hydraulic rams, both innovative techniques at the time.

Another method used to transmit energy used a trompe, which produces compressed air from falling water.

Where there is a plentiful head of water it can be made to generate compressed air directly without moving parts.

A separate outlet in the roof of the chamber supplies the compressed air to the surface.