Curious Calculation. Few persons have any idea of the space which would be occupied by the whole population now living on the face of the globe, if congregated together ; and as to that vast majority, the dead, the wildest conjectures have been indulged in. Some have even doubted whether such a number of human beings could find standing-room on the whole face of the earth. Now, taking the present population of the earth to number one thousand millions, and assuming that the average population of the earth from the time of Adam till now has been half that number, and that the generations of men have averaged forty years each, we come to this conclusion - that the smallest county of New York would furnish sitting room for all the men. women and children now alive on the earth; and that a number of human beings equal to all that have ever lived upon the face of the earth, might stand within the area of the largest county of New York.