When there is a requirement to lap very small specimens ( from 3 " down to a few millimetres ), a lapping jig can be used to hold the material while it is lapped ( see Image 3, lapping machine and jig ).

When measuring liquid pressure, a loop filled with gas or a light fluid can isolate the liquids to prevent them from mixing but this can be unnecessary, for example when mercury is used as the manometer fluid to measure differential pressure of a fluid such as water.

When it melts, silicon becomes a reasonable metal with an electrical conductivity of 1. 0 – 1. 3 × 10 < sup > 4 </ sup > S • cm < sup >− 1 </ sup >, a value similar to that of liquid mercury.

When the switch is tilted in the appropriate direction, the mercury touches a set of contacts, thus completing the electrical circuit through those contacts.

When the machine is rocked or tilted in an attempt to gain a product, the mercury switch activates, sounding an alarm.

When they encountered mercury atoms in the tube, they participated in purely elastic collisions.

When the amalgam is cold it is squeezed through chamois leather to separate the superfluous mercury ; the gold, with about twice its weight of mercury, remains behind, forming a yellowish silvery mass with the consistency of butter.

When the metal to be gilded is wrought or chased, it ought to be covered with mercury before the amalgam is applied, that this may be more easily spread ; but when the surface of the metal is plain, the amalgam may be applied to it directly.

When the mercury has evaporated, which is known by the surface having entirely become of a dull yellow color, the metal must undergo other operations, by which the fine gold color is given to it.

When Bell arrived on February 26, Bell visited his lawyers and then visited examiner Wilber who told Bell that Gray's caveat showed a liquid transmitter and asked Bell for proof that the liquid transmitter idea ( described in Bell's patent application as using mercury as the liquid ) was invented by Bell.

When red mercury first appeared on the international black market 15 years ago, the supposedly top secret nuclear material was ' red ' because it came from Russia.

When the mercury reaches " Cadet School ", that's where Willy goes, and the game is over.

When introduced in the 1960s, alkaline batteries contained a small amount of toxic mercury amalgam to control side reactions at the zinc cathode.

When heated, mercury vapour is created inside the lamp, and deposited when it cools.

When that happens, up to 30 mg of mercury vapor is released into the atmosphere.

When Angel tries to help her escape, he tells her he had the pill tested, and that it contained powdered lead with trace amounts of arsenic and mercury, each of which are traditional ingredients in artistry paints linked to accidental self-poisoning.

When a mercury vapor lamp is first turned on, it will produce a dark blue glow because only a small amount of the mercury is ionized and the gas pressure in the arc tube is very low, so much of the light is produced in the ultraviolet mercury bands.

When the current is turned on, it will initiate dissolution of the metallic mercury on the one side of the drop in the capillary and deposition on the other side of the same drop.

When glass mirrors first gained widespread usage in Europe during the 16th century, most were made of an amalgam of tin and mercury, but by the 19th century mirrors were commonly made through a process by which silver was coated onto a glass surface.

When electrical current flowed through the wire, the magnetic field of the wire created a force with the field of the permanent magnet such that the wire would rotate out of the mercury trough and interrupt the electrical circuit.

When they came to Mr. Jack's photograph, twenty by twelve inches in a curly silver frame, Miss Ada said, `` By rights I ought to leave that, seeing he won't take my clotheshorse ''.

When it comes to rate of early growth, the Indian python leads with a figure of about 3 feet 6 inches per year for the first two years, more or less.

When these or H-shaped goal posts are used in football, the lower portions of the posts are covered with several inches of heavy foam padding to protect the safety of the players.

When hair is trimmed, only the first few centimeters need to be removed, whereas haircuts can sometimes result in the loss of many inches of hair.

When Williams took his cast off, he could only extend the arm to within four inches of his right arm.

When the casket was opened, a small book of the gospels, measuring only three-and-a-half by five inches, now known as the Stonyhurst Gospel, was found.

When pacing, the opossum's stride generally measures from 7 to 10 inches, or approximately 18 to 25 cm ( in the pacing diagram the stride is 8. 5 inches, where one grid square is equal to one square inch ).

When Hurricane Floyd in 1999 dropped approximately 19 inches ( 480 mm ) of rain in 24 hours on some long-term never-till fields, visual observation showed virtually no erosion.

When he located the vein, he estimated the vein to be fifty feet long and twelve inches wide.

When levitated, the maglev vehicle has about 15 centimetres ( 5. 91 inches ) of clearance above the guideway surface.

When the barrel diameter is given in inches, the abbreviation " cal " is used in place of " inches.

When the pins reach the deck, the pinsetting table shifts back several inches before rising back to its position.

When sites were separated by the various silvicultural treatments, only the 3-year-old light cut ( Douglas-fir and ponderosa pine larger than 14 inches ( 35 cm ) in dbh and other species larger than 6 inches ( 15 cm ) dbh were harvested ) and the selectively logged ( 20 % of 6 to 8 inch-dbh ( 15. 2 – 20. 3 cm ) trees, 25 % of 8 to 12 inch-dbh ( 20. 3 – 30. 5 cm ) trees, 45 % of 12 to 24 inch-dbh ( 30. 5 – 61. 0 cm ) trees, and 75 % of > 24 inch-dbh (> 61. 0 cm ) trees were removed ) sites showed significantly ( p < 0. 01 ) greater use of Douglas-fir by western tanager than would be expected from availability.

When the spring is at full compression or extension, the operator is lifted by the recoil of the spring, being launched several inches or feet into the air.

When thrown correctly, it could have a break from seven to as much as 20 inches in comparison to the same pitcher's fastball.

When severe GH deficiency is present from birth and never treated, adult heights can be as short as 48-58 inches ( 122 – 147 cm ).

When the maize is 15 cm ( 6 inches ) tall, beans and squash are planted around the maize, alternating between the two kinds of seeds.

When Märklin formalized several standards for track gauges in 1891, Bing adopted them, and added O gauge by 1895 and gauge III ( 2. 5 inches ), causing confusion as Marklin Gauge III became Bing gauge IV ( 3 inches ).

When Boruwlaski was fifteen and 64 cm ( 25 inches ) tall, the countess took him to Vienna, where he was presented to Empress Maria Theresa, a lady Joseph describes as the ' Queen of Hungary ' in his autobiography.

When he was old enough to work, he was apprenticed as a blacksmith, a profession chosen because of his massive size and strength ( he grew to be well over six feet six inches tall, or 198 centimeters, and weigh some 260 pounds, or 118 kilograms, especially large at the time ).

When I show up he will know you are a good wife to have told him about it ''.

When the Know-nothings get control, it will read, All men are created equal except Negroes and foreigners and Catholics.

When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

When finally the two bedraggled men reach their friend's home, Voltaire's fears are once again aroused.

`` When are you to leave ''??

When the roof blocks are all in place, the final rows of wall blocks are mortared into position.

When the aid operations are reorganized the Peace Corps should remain a semi-autonomous, functional unit.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

When aircraft are no longer helpless on airfields, they are no longer vulnerable to Aj.

When more than two figures are separated by subtraction symbols the subtraction must be carried out from the left to right if the result is to be correct.

When they're on, the top edges are planed even with the sheer batten.

When painting, Mason's physical eyes are half-closed, while his mind's eye is wide open, and this circumstance accounts in part for the impression he wishes to convey.

When improvements are recommended in working conditions -- such as lighting, rest rooms, eating facilities, air-conditioning -- do you try to set a measure of their effectiveness on productivity??

When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When some thirteen records of newly and recently born individuals are collated, little or no correlation between length and distribution can be detected.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??