Let us now go a little lower down, and take another set of sixteen departments--those which lie together in Mr Sadler's tables, from Herault to Jura inclusive. Here the population is still thicker than in the second of those sets which we before compared. The fecundity, therefore, ought, on Mr Sadler's principle, to be less than in that set. But it is again greater, and that in all Mr Sadler's three tables. We have a regularly ascending series, where, if his theory had any truth in it, we ought to have a regularly descending series. We will give the results of our calculation. The number of children to 1000 marriages is-- 1st Table 2nd Table 3rd Table In the sixteen departments where there are from 68 to 107 people on a square mile................ 4188 4226 3780 In the sixteen departments where there are from 107 to 125 people on a square mile................ 4374 4332 3855 In the sixteen departments where there are from 134 to 155 people on a square mile................ 4484 4416 3914 We will give another instance, if possible still more decisive. We will take the three departments of France which ought, on Mr Sadler's principle, to be the lowest in fecundity of all the eighty-five, saving only that in which Paris stands; and we will compare them with the three departments in which the fecundity ought, according to him, to be greater than in any other department of France, two only excepted. We will compare Bas Rhin, Rhone, and Nord, with Lozere, Landes, and Indre. In Lozere, Landes, and Indre, the population is from 68 to 84 on the square mile or nearly so. In Bas Rhin, Rhone, and Nord, it is from 300 to 417 on the square mile. There cannot be a more overwhelming answer to Mr Sadler's theory than the table which we subjoin: The number of births to 1000 marriages is-- 1st Table 2nd Table 3rd Table In the three departments in which there are from 68 to 84 people on the square mile............... 4372 4390 3890 In the three departments in which there are from 300 to 417 people on the square mile............... 4457 4510 4060