Note: If 1/2-inch panel board is used inside and out, or 5/8-inch one side and 3/8-inch the other, and 1/8-inch glass is used, stock lumber in Af, Af, and Af can be used in making the glass panels.

If the glass is damaged, atmospheric pressure can collapse the vacuum tube into dangerous fragments which accelerate inward and then spray at high speed in all directions.

If later heat treatments cause this glass to become partly crystalline, the resulting material is known as a glass-ceramic, widely used as cooktop.

If an evacuated glass tube is equipped with two electrodes and a voltage is applied, the glass opposite of the negative electrode is observed to glow, due to electrons emitted from and travelling perpendicular to the cathode ( the electrode connected to the negative terminal of the voltage supply ).

If a person's hands are placed around the glass without touching it, the vanes will turn slowly or not at all, but if the glass is touched to warm it quickly, they will turn more noticeably.

If a similar ball is charged by the same glass rod, it is found to repel the first: the charge acts to force the two balls apart.

If a second piece of glass be rubbed with a second piece of resin, and if the piece be then separated and suspended in the neighbourhood of the former pieces of glass and resin, it may be observed:

If a body electrified in any manner whatever behaves as the glass does, that is, if it repels the glass and attracts the resin, the body is said to be ' vitreously ' electrified, and if it attracts the glass and repels the resin it is said to be ' resinously ' electrified.

If shots are taken out of sequence, as is often the case, he will be alert to make sure that that beer glass is in the appropriate state.

If the pane is not a good insulator ( such as a single pane window ), water vapour condenses on the glass forming patterns.

* If medieval glass has flowed perceptibly, then ancient Roman and Egyptian objects should have flowed proportionately more — but this is not observed.

* If glass flows at a rate that allows changes to be seen with the naked eye after centuries, then the effect should be noticeable in antique telescopes.

If there is no cell attached to the glass, there will be no interference.

If the store is crammed with used athletic gear, old stereos, and old tools, the store owner must spend time and money shelving and sorting items, displaying them on different stands or in glass cases, and monitoring customers to prevent shoplifting.

If there are two horizons there is side error ; adjust the horizon glass / mirror until the stars merge into one image or the horizons are merged into one.

If for example, visible light were traveling through acrylic glass ( with an index of refraction of 1. 50 ) into air ( with an index of refraction of 1. 00 ), the calculation would give the critical angle for light from acrylic into air, which is

If the drain is opened and the tumbler is kept in position over the hole, the water in the tumbler drains out leaving the glass filled with air, and this then acts as the plug.

If the circumstances are faced frankly it is not reasonable to expect this to be true.

If his dancers are sometimes made to look as if they might be creatures from Mars, this is consistent with his intention of placing them in the orbit of another world, a world in which they are freed of their pedestrian identities.

If a work is divided into several large segments, a last-minute drawing of random numbers may determine the order of the segments for any particular performance.

If they avoid the use of the pungent, outlawed four-letter word it is because it is taboo ; ;

If Wilhelm Reich is the Moses who has led them out of the Egypt of sexual slavery, Dylan Thomas is the poet who offers them the Dionysian dialectic of justification for their indulgence in liquor, marijuana, sex, and jazz.

If he is the child of nothingness, if he is the predestined victim of an age of atomic wars, then he will consult only his own organic needs and go beyond good and evil.

If it is an honest feeling, then why should she not yield to it??

If he thus achieves a lyrical, dreamlike, drugged intensity, he pays the price for his indulgence by producing work -- Allen Ginsberg's `` Howl '' is a striking example of this tendency -- that is disoriented, Dionysian but without depth and without Apollonian control.

If love reflects the nature of man, as Ortega Y Gasset believes, if the person in love betrays decisively what he is by his behavior in love, then the writers of the beat generation are creating a new literary genre.

If he is good, he may not be legal ; ;

If the man on the sidewalk is surprised at this question, it has served as an exclamation.

If the existent form is to be retained new factors that reinforce it must be introduced into the situation.

If we remove ourselves for a moment from our time and our infatuation with mental disease, isn't there something absurd about a hero in a novel who is defeated by his infantile neurosis??

If many of the characters in contemporary novels appear to be the bloodless relations of characters in a case history it is because the novelist is often forgetful today that those things that we call character manifest themselves in surface behavior, that the ego is still the executive agency of personality, and that all we know of personality must be discerned through the ego.

If he is a traditionalist, he is an eclectic traditionalist.

If our sincerity is granted, and it is granted, the discrepancy can only be explained by the fact that we have come to believe hearsay and legend about ourselves in preference to an understanding gained by earnest self-examination.

If to be innocent is to be helpless, then I had been -- as are we all -- helpless at the start.

If the steel is cooled slowly, the iron will gradually change into its low temperature allotrope.

If a circular building is aerodynamically smooth, and cooler than the ground, it can be passively cooled by the " dome effect.

If the air is cooled to its dew point and becomes saturated, it normally sheds vapor it can no longer retain which condenses into cloud.

If infrared detectors were not kept cooled, the radiation from the detector itself would contribute noise that would dwarf the radiation from any celestial source.

If a magnetic field is applied as the sample is cooled to the transition temperature, magnetization of the sample increases as described by the Curie law.

If the sample is cooled below T < sub > c </ sub > in the absence of an external magnetic field and a magnetic field is applied after the transition to the spin glass phase, there is a rapid initial increase to a value called the zero-field-cooled magnetization.

If the glass is extruded and cooled quickly at this temperature, it will be unable to form an ordered structure.

If the CPU heatsink or fan is changed on such boards, other heatsinks may not be cooled sufficiently.

If heat conduction is too great, fluid moving down by convection is heated by conduction so fast that its downward movement will be stopped due to its buoyancy, while fluid moving up by convection is cooled by conduction so fast that its driving buoyancy will diminish.

If the stored air is not cooled as the tank is filled, then when the air cools off later, its pressure decreases and available energy decreases.

If the bypass setting is too high and the griddle plate is not being cooled by cooking loads, the surface temperature of the griddle can drift well beyond the thermostatic set point.

If electrons are accelerated to produce X-rays then a water cooled tungsten target is used.

If water is cooled at a rate on the order of 10 < sup > 6 </ sup > K / s, the crystal nucleation can be avoided and water becomes a glass.

If the steel is cooled slowly the transformation will agree with the equilibrium predictions and pearlite will dominate the microstructure with some fraction of proeutectoid ferrite or cementite depending on the chemical composition.

If the lava had cooled perfectly evenly, all of the columns would be expected to be hexagonal, but some of the columns have different polygonal cross-sections due to variations in cooling.

If the die is softer because it was not fully cooled, it will not harden to the same standard as a die which has received proper treatment.

If the protein is sensitive to proteolysis, it is usually desirable to proceed quickly, and keep the extract cooled, to slow down proteolysis.

* If the cook wants to remove the fat, after the stock is finished it is cooled and the fat, which floats, separates and solidifies into globs within the stock, which can be removed with ease.

the out coming gase cooled by passing thorugh spiral lead pipes. the emerged gase passed through cottrell precipitator, where charged colloidal particles attracted by electrodes and the gas become free from colloidal particles. then the gase is dried and passed through arsenic purifier which containing ferric hydrodxide, which absorbs arseneous oxide. finally we will check the purity of the gas by passing through tyndall box. If the gas is impure we will observe the scattering of light, if not it is pure.

If cooled below this temperature, the solder will not flow.

If only a small volume needs to be cooled to 1 K, the 1-K pot is used.

If drunk neat, it is generally cooled and served in shot glasses.

If the gas temperature is above the water dew point, it is initially cooled by evaporation of water drops.

If this heat and light were allowed to escape, the remains of the bomb would lose a gram of mass, as it cooled.