“There is one feature in your system, Mr. Midith, I can not yet see into, and I should like to have you make that a little plainer if you can,” said Rev. Dudley, “and that feature is about the density of population. I may be dull in comprehension, but it does not, in my opinion, figure out well. You say that a square mile of land can, under the same conditions, support as many, and no more, human beings on Mars than it can on earth. You further say that your communities contain about four townships; have, in an average, about 120,000 inhabitants. Four townships contain 144 square miles. This gives a population of over 800 to the square mile, while Belgium, the most densely populated country on earth, has only a little over 500 to the square mile; and political economists, I think, unanimously agree that, without importation, the land of Belgium can not raise sufficient products to support its own population.” “Rev. Dudley, I think that I fully agree with your political economists on the Belgium question of population. It is very likely true that the land of Belgium can, under _your_ social and industrial system, not support, without importation, its own inhabitants; but that does not argue in favor of the fact that the Marsites, under a _different_ social and industrial system, can sustain, in superfluity, a population nearly twice as dense as that of Belgium. I said _under the same conditions_ the earth can sustain as dense a population as Mars can, but the conditions are not the same. With a little patience and close attention, I think I shall be able to clear up this question for you satisfactorily.