1) That this factor is too important to be ignored does not require any further proof. 2) What is done cannot be undone. 3) That the sun is but a typical star is one of the most significant facts of modern astronomy. 4) What we want to stress is indivisibility and. complexity of the environment. 5) What follows is extremely significant in its bearing on the problem of the relationship of physics with other sciences. 6) That this was not the case was proved when they obtained more data. 7) What goes into a system must eventually come out. 8) What we try to do is to foretell a general tendency rather than a particular development. 9) Whether the project will be approved at present is a matter of importance. 10) Whether this difference of approach played a decisive role in the final solution of the problem remains a subject for speculation. 11) Whether it is necessary to apply an enormous pressure to a liquid to get changes in volume is not difficult to prove. 12) It is obvious that an increased pressure will tend to prevent this expansion and thus to prevent the conversion of water into steam. 13) What they were speaking about was quite clear to him. 14) Where I shall find all the necessary data for my report is still a question. 15) What is necessary for us at present is to get all the necessary data. 16) How to use personal experience in practical work must be known to every specialist. 17) What has been called the scientific method began to appear in the time of Galilei. 18) That heat flows from a place of higher to one of lower temperature but never in the reverse direction should be kept in mind.
