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 combining the functions necessary to perform the many experiments discussed. Such an effort would have been large and perhaps entirely in appropriate at this early stage of overall planning for possible lunar experimentation.

In conclusion, it should perhaps be emphasized that the course taken has been the exploration of a fairly large number of problems and experimental possibilities without, in any given instance, attempting to be exhaustive. It is evident that many aspects of the problems which are treated here remain untouched or, at best, have been only qualitatively considered, Furthermore, it is almost unnecessary to point out that a vast number of possible experiments, not even mentioned or perhaps not even considered by the present group, should be carefully evaluated. The enormous effort that would be involved in any controlled experiment on or near the moon demands nothing less than an exhaustive evaluation of suggestions by the many qualified persons who have begun to think about this general problem. 4