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I was to ncil the drawings of the hmmer.
watched the smith hmmer thin iron plates.
The mechanical shop is equipped with machinery of our own make.
It is necessary to rrl lamp the dark passage to the warehouses which house the emergen facilities.
get to the station in tim, the driver had to increase speed.
On this lin, modern freight () ships speed not only different goods but whole railway trains as well.
This railway branch is known to ship mainly oil and machiner.
r the road branches into two separate lines.

FROM THE HISTORY OF COLO(U)RS (British English - colours; American English - colors)

Colour is property of materials that has bn n integral part of humn rin in every age and civilization. It has caused mn to wonder about its rigin nd to experiment in its production.
In man cases, colours took n mystic and religious significance. he ancient Greeks apparently assigned colours to what they believed were the four basic elements of nature: earth (green), water (blue), fire (red) and air (yellow).
Man's use of colours dates back probably 150,000 to 200,000 years when primitive mn first used red and yellow clays to paint their bodies. rl mn also burned bones and teeth to produce black pigments.
Organic colours were obtained from insects, other animals and plants. Chalk and lim were used for white. Reds were made from the root f madder (). Blue m from r minerals and th indigo plant. Typically, these substances were first washed and dried, then mixed into ils for use in craft such as painting, pottery and ttiles. Other mineral colours were made from ores f iron, copper and lead.
oda, colour scin plays major role in business, scien nd industry. It is n of the few disciplines that cuts across the boundaries f art, biology, physics, psychology, chemistry, geology, mineralogy, nd mn other fields.


Animals employ colours for man purposes. he most obvious one is camouflage. It allows crturs to blend into their background and avoid detection. Often the animal's lour changes with the seasons to coincide with foliage changes.
classic ml of selective advantage of camouflage is presented by peppered moths ( ). Normally light in colour, black specimens grew more mmn as the 19th century industrial England burnd mr l, which deposited soot () n buildings and trees. Of urs, birds could mr easily see and catch lighter moths against this background. As a result, nowadays approximately 90 r cent of the moths in industrial areas of England are dark.
an other animals are brightly and conspicuously coloured. n purpose of vivid display is warning. Poisonous and ill-tasting insects use bright, easily recognized patterns as signatures to look but not taste. Thus larger animals learn to avoid ting them. It is in the interests of these insects to show warning flag of som kind.
he typical was, for example, carries conspicuous colour pattern of black and yellow bands n its body. This is so distinctive that it is s for predator to rmember. After few unfortunate rinces it quickly learns to avoid insects bearing this ttern.
Certain moths and butterflies tak more bizarr use of color. Large eye-like markings n their wings frighten, or at least nfuse, birds and other predators. Similar markings are found n some fish. Some insects use colour to disguise themselves as inanimate objects, imitating things ranging from leaves to bird droppings.
Colours play important roles in man animals' mating behaviour. Usually colour funtions either to warn off rivals or to mak an individual more attractive in competition for mate.


The internationally used scientific sstm of measurement is called the metric system. It has decided advantages over the so-called English system, fr its divisions are always decimal: that is, they are based n the multiple f 10. Whereas in the English system 12 inches equal 1 foot, in the metric one 10 millimetres equal 1 ntimetre, and 100 (10 x 10) ntimetre equal 1 metre.
As to the English system, 1 yard (which is a little shorter than a metre) equals to 3 feet, 1 foot to 12 inches, and 1 mile to 5,280 feet, which makes calculations not so easy to say the least.
h measurement f r in the metric system involves a square metre equaling to 10,000 square centimetres, whereas the English system deals with square feet containing 12 x 12 = 144 square inches. Things get even worse when it comes to th measurement of volume.

All the steam-pipes wer shut ff.
The thick plates were rolled out into thin sheets and the sheets were then rolled u.
h engineer put the sheet of r down and put down the new calculation.
The chairman called upon the scientists to concentrate n the fulfilment of the tasks set b the ln.


The expedition ran short of water.
As nothing delayed us, our tin rn n time.
The train was running at top speed in rdr to arrive in good time.

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