Additional material

Ex. 1. Translate the following sentences defining predicative infinitive constructions and the functions of the infinitives.

 

1. The radius of our orbit is believed to be increasing very slowly.

2. The copper to be refined is cast into large plates.

3. This property allows the alpha particle to be detected.

4. The source is so weak as to add comparatively few additional counts above the background.

5. There appear to be two distinct effects in this case.

6. Electrons can be made to travel at very high speeds.

7. The idea of nuclear charge and atomic number is now realized to be most important.

8. The cooling is effected by methods to be discussed in the next chapter.

9. A certain period of time must be allowed for the oil drops to be removed by the electric field or by precipitation.

 

10. There appears to be direct evidence of the existence of negative electrons in matter.

11. The distance d was calculated from equation 1—25and found to be 2.814 Angstroms.

12. The best agreement is to be found in the case of carbonic acid.

13. In our discussion the nucleus will be taken to beat rest.

14. We may suppose the alpha-particles within the nucleus to be in motion.

15. Ordinary objects are not likely to move with a velocity approaching the velocity of light.

16. The lithium nucleus is too small for so many collisions to occur.

17. Secondary radiation may be expected to rise when the primary radiations are observed.

18. Light is to be considered as some kind of wave motion of electromagnetic origin.

19. There is no reason for the conversion of mechanical into radiated energy to be continuous.

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20. Alpha-rays were shown to be identical, no matter from what radioactive element they are emitted.

21. There is no definite molecular weight to be ascribed to water when in a liquid state.

22. Pitchblende was shown by X-ray and emission examination to have been a mixed salt.

23. It will be necessary for the observer to remain in the dark at least ten or fifteen minutes to accustom his eyes to the darkness.

24. In liquids and solids the movement of molecules must be supposed to be more restricted.

25. One may consider the charge-exchange reaction to have been established under these conditions.

26. Radium appeared to be an element, whose salts were found to be isomorphous with the corresponding salts of barium.

27. The proportion of colouring matter to be mixed with a body depends chiefly on the effect to be produced.

28. The nucleus of every atom is assumed to contain enough protons to account for the nuclear charge.

29. At first the alpha-rays were thought to be undeviated by the magnetic fields.

30. As information accumulated, it became possible to plan experiments that were likely to yield the material sought for.

31. During the Dark Ages people believed the Earth to be flat.

32. All circumstances likely to affect the accuracy of the measurements should be carefully observed.

33. Samples of two ores from a region known to be geologically very old have ages close to 2000 million years.

34. When a current is said to be flowing from the positive

3* pole of a battery towards the negative pole, actually electrons are running in the opposite direction.

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35. To test for a soluble iodide one adds to a test tube containing the solution to be tested, one cubic centimeter of carbon bisulphate, and a few cubic centimeters of chlorine water and shakes the mixture vigorously.

36. To maintain a constant temperature in a small or large container was for years and still is a very important technical problem because most precise physical and chemical experiments require the temperature of the object to be constant at the moment when the readings or any other kind of observation are made.

37. The speed of the particles (about ten thousand miles per second) is a bit too swift for us to study in detail.

38. Any metal will displace another metal, occupying a lower position in the activity series, from a solution of any of the salts of the second metal, provided that the metal to be displaced is not very far above hydrogen,

39. The equilibrium methods of measuring relative activities allow the substance whose relative activities are to be measured to come to equilibrium and to determine the conditions of the equilibrium.

i 40. We consider the hotness or coldness of any body to depend on the quantity of heat possessed by the body.

41. Ions have been found by numerous experiments to move as easily through a jell as through the liquid solution.

42. One of the main objects of experiments on mesons has been to determine whether the properties of the particles found in cosmic rays fit the predictions of the meson theory started by Yukawa.

43. Galacturonic acid was shown by Hagglund and his collaborators to be present in the sulphite liquors from pinewood.

44. A body with total kinetic energy reduced to zero would not be able to transfer heat to any other body and might then be said to be at the absolute zero temperature.

45. With an increased production of uranium in recent years interest in uranium steel is reviving again and its

outstanding properties make it seem likely to earn for itself a favourable position among special alloy steels.

46. For the growth to continue steps must be formed gradually at ordinary temperature.

47. We must discuss the actual values of — x for contacts between metals and insulators, and see whether they are likely to be small enough for any current to pass.

48. To begin with a simple example, let us in the first place, without troubling about velocity, consider the question of the number of molecules which on the average are to be found in a definite volume of element W.

49. The streams of ionized particles assumed to be emitted at the time of flares and to escape sometimes from the solar atmosphere and reach the Earth, giving rise to sudden magnetic storms, also have velocities of the right order.

50. The condition for the rays SA and SB to reinforce each other on reuniting at P is that their light paths differ by an integral number of wave lengths.

 

51. It is quite common to use the so-called probable error, or the error for which there seems to be an even chance of existing in the case of anyone observation.

52. In astronomical subjects it is customary to print to a high contrast in order to render visible details likely (or even certain) to be otherwise missed.

 

53. The theorists were not sure whether what the observers considered to be the brightest stars in a galaxy were actually stars.

54. In the present discussion observations of declination have been accepted as likely to provide the best representation of the sun's longitude.

55. The discussion of too many details and special cases does not seem to be desirable, since it is likely to obscure the fundamentally important points.