only the counter at one end was lighted by a long fluorescent tube suspended directly above it.

Argon was also blown at low velocities ( mass flow rate Af ) through a tube coaxial with the cathode as an additional precaution against contamination of the arc by air.

Spectra were also obtained from a sample in a spherical container which was made by blowing a bubble on the end of a capillary glass tube.

-- Matheson highest purity tank chlorine was passed through a tube of resublimed Af into an evacuated Pyrex system where it was condensed with liquid air.

The purified product was stored at -78-degrees in a tube equipped with a break seal.

The radiochlorine was stored at -78-degrees in a tube equipped with a break seal.

The contents of the manifold for liquid phase experiments were then mixed by shaking, redistributed to the reaction tubes, frozen down, and each tube was then sealed off.

In the liquid phase runs the amount of carbon tetrachloride in each reaction tube was determined by weighing the tube before opening and weighing the fragments after emptying.

One drop of each sample was added to one drop of a 2% suspension of group Af or group B red cells in a small Af test tube.

The luminous gain of the discussed tube was calculated from Eq. ( 6 ) for the 16 possible combinations of S-11 and S-20 photocathodes and P-11 and P-20 phosphor screens, for night light and P-20 light input.

In Chicago, some time ago, Mr. H., age 27, a diabetic since he was six, stopped using insulin because he had bought a `` magic spike '' -- a glass tube about the size of a pencil filled with barium chloride worth a small fraction of a cent -- sold by the Vrilium Company of Chicago for $306 as a cure-all.

In the case of the tapering worm tubes Selkirkia, trilobites are always found with their heads directed towards the opening of the tube, suggesting that they reversed in ; the absence of any moulted carapaces suggests that moulting was not their primary reason for seeking shelter.

Electrothermal AAS ( ET AAS ) using graphite tube atomizers was pioneered by Boris V. L ’ vov at the Saint Petersburg Polytechnical Institute, Russia, since the late 1950s, and further investigated by Hans Massmann at the Institute of Spectrochemistry and Applied Spectroscopy ( ISAS ) in Dortmund, Germany.

Soon, the seat tube was added, creating the double-triangle diamond frame of the modern bike.

* The IBM 7080 transistorized computer was backward compatible with all models of the IBM 705 vacuum tube computer.

In these inventions, the ink was placed in a thin tube whose end was blocked by a tiny ball, held so that it could not slip into the tube or fall out of the pen.

The first major computer product that came from this marriage was the B205 tube computer.

The Chinese Cheka detachments stationed in Kiev reportedly would attach an iron tube to the torso of a bound victim and insert a rat in the tube closed off with wire netting, while the tube was held over a flame until the rat began gnawing through the victim's guts in an effort to escape.

The electronics also generates the relatively high voltage, typically 400 – 600 volts, that has to be applied to the Geiger-Muller tube to enable its operation.

Pneumatic tube networks gained great prominence in the late 19th and early 20th century for businesses or administrations that needed to transport small but urgent packages ( such as mail or money ) over relatively short distances ( within a building, or, at most, within a city ).

Some recent designs have a splash deflector on the top end that directs any water that splashes over the open tube to the outside of the tube, thereby keeping the tube relatively free from water.

In addition to the tube itself, another important consideration is the relatively high-voltage circuitry to drive the tube.

A GM tube has a counting efficiency which remains relatively constant over a range of energy levels, but the energy response changes considerably over that range, due to a variable interaction with the fill gas and the tube wall.

The lack of visible flames and relatively clean wood smoke produced lulled the emergency services into a false sense of security, especially as firemen had attended more than 400 similar tube fires over the previous three decades.

The pars flaccida consists of two layers, is relatively fragile, and is associated with eustachian tube dysfunction and cholesteatomas.

The bugle for instance, has the classification number 423. 121. 22, even though it is generally regarded as a relatively simple instrument ( it is basically a bent conical tube which you blow down like a trumpet, but it does not have valves or finger-holes ).

As the Eschmann tracheal tube introducer is considerably less rigid than a conventional stylet, this technique is considered to be a relatively atraumatic means of tracheal intubation.

The volume of mercury changes slightly with temperature ; the small change in volume drives the narrow mercury column a relatively long way up the tube.

Fire tube boilers are generally used for relatively small steam capacities and low to medium steam pressures.

As high-power solid-state amplifiers are available, a common tradeoff is to sacrifice efficiency and produce a relatively small enclosure capable of reproducing low frequencies, but requiring a lot of power ; in the days of vacuum tube amplifiers a 35W amplifier was large and expensive, and large, efficient, enclosures were more often used.

Historically, many headphones had relatively high impedance, often over 500 ohms in order to operate well with high impedance tube amplifiers.

The Liebig condenser is simply a straight tube within a water jacket, and is the simplest ( and relatively least expensive ) form of condenser.

This includes its massive horn loudspeakers designed to fill a large theater with sound from a relatively low-powered tube amplifier.

De Forest invented the Audion, a vacuum tube that takes relatively weak electrical signals and amplifies them.

Individuals in PVS are seldom on any life-sustaining equipment other than a feeding tube because the brainstem, the center of vegetative functions ( such as heart rate and rhythm, respiration, and gastrointestinal activity ) is relatively intact ( Emmett, 1989 ).

Unlike the relatively swift reactions in a common fluorescent tube, phosphorescent materials used for these materials absorb the energy and " store " it for a longer time as the processes required to re-emit the light occur less often. Energy scheme used to explain the difference between fluorescence and phosphorescence

The peninsula remained relatively remote from central London until the opening of the Blackwall Tunnel in 1897, and had no passenger railway or London Underground service until the opening of North Greenwich tube station on the Jubilee Line in 1999.

The long-tailed pair has many attributes as a switch: largely immune to tube ( transistor ) variations ( of great importance when machines contained 1, 000 or more tubes ), high gain, gain stability, high input impedance, medium / low output impedance, good clipper ( with not-too-long tail ), non-inverting ( EDSAC contained no inverters!

Sound is produced by the vibration of an air-stream blowing across an open hole at the end of a resonating tube.

In this group also belong reeds with a ' cover ,' i. e. a tube in which the air vibrates only in a secondary sense, not producing the sound but simply adding roundness and timbre to the sound made by the reed's vibration ; generally recognizable by the absence of fingerholes.

Major problems included microphonic difficulties and tube failures attributed to vibration and acceleration in gun projectiles.

Key difficulties in pulse detonation engines are achieving DDT without requiring a tube long enough to make it impractical and drag-imposing on the aircraft ( adding a U-bend into the tube extinguishes the detonation wave ); reducing the noise ( often described as sounding like a jackhammer ); and damping the severe vibration caused by the operation of the engine.

The driveshaft is usually a hollow metal tube that requires balancing to reduce vibration and contains no internal bracing.

For half the vibration cycle, the air flows into the tube from both ends until the pressure reaches a maximum.

where is the temperature dependent stiffness of the tube, a shape-dependent factor, the width, the time lag, the vibration frequency and the inertia of the tube.

The natural vibration frequency of the flow tubes depend on the combined mass of the tube and the fluid contained in it.

Both mass flow and density measurements depend on the vibration of the tube.