Английский язык. Справочник по грамматике, устные темы и контрольные задания. Бухарова Г.П. - 134 стр.

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136
round the sun. The sun is one of the stars in the galaxy, in which there are about
100,000 million stars. It is not in the middle of the galaxy, but rather near one edge.
There are millions of galaxies in the universe and so there are thousands of
minions of millions of suns. Many astronomers believe that some of these suns have
planets as our sun does. Gravitation is the force which holds all the atoms of a star
together. It holds the sun together and it holds the atoms of the earth together, It holds
us on the earth.
Einstein produced a new law of gravitation. Its main results are the same as the
results of Newton's law; but in very small and fine matters Einstein's law gives
different results. One of these is that gravitation bends light a little; but according to
Newton's law gravitation has very little effect on light. Einstein showed this fact by
means of mathematics and not by experiment. And astronomers later proved by
experiments that Einstein was right.
Notes
1. according to — в соответствии с
2. in fact — на самом деле, фактически
3. but rather — а скорее
Текст 9
PROGRESS OF INORGANIC CHEMISTRY
We shall define inorganic chemistry today as the study of formation,
composition, structure, and reactions of the chemical elements and their compounds,
except those of carbon. Many will say that this is not the definition of inorganic
chemistry alone, but chemistry itself.
Indeed the earlier divisions of chemistry are disappearing and the subject is
becoming an integrated whole. A modern inorganic chemist slightly distinguishes
between inorganic, organic, and physical chemistry. He attaches organic groups to a
metal atom if it is more convenient for investigation; he uses any of the available
methods of physical chemistry, if necessary for the solution of his problem. Two facts
helped the development of inorganic chemistry: the growth of the theoretical
techniques of quantum mechanics and new optical, electrical and magnetic
techniques of physical measurement by which structure can be investigated. For a full
understanding of the way in which these achievements affected the development of
inorganic chemistry, let's make a short survey of the history of the subject.
We may start with 1828, the year in which Wohler, the pioneer of organic
synthesis, showed the interrelationship between inorganic and organic chemistry. For
the next fifty years inorganic and organic chemistry progressed side by side. The
main work in inorganic chemistry dealt with the preparation of new compounds and
the development of methods of analysis. Great numbers of new compounds were
being described and important work was being carried out on the determination of
atomic weights. The year 1887 may be accepted as the date of appearance of physical

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