The Slave State which has increased most rapidly to the square mile of all of them from 1790 to 1860, has had a smaller augmentation per square mile than that Free State which has increased most slowly per square mile during the same time of all the Free States, and the result is the same as to wealth and education also. Under the best circumstances for the Slave States, and the worst for the Free States, this result proves the uniformity of the rule (like the great law of gravitation), knowing no exception to the effect of slavery in depressing the progress of States in population, wealth, and education.
The isothermals of the great Humboldt (differing so widely from parallels), which trace the lines of temperature on the earth's surface, prove, as to heat, the climate of the South (running a line from Charleston to Vicksburg) to be substantially the same as that of Greece and Italy-each, in its turn, the mistress of the world.
The Census of 1860 exhibits our increase of population from 1790 to 1860 at 35.59 per cent., and of our wealth 126.45. Now, if we would increase the wealth of the country only one tenth in the next ten years, by the gradual disappearance of slavery (far below the results of the Census), then our wealth being now $16,159,616,068, the effect of such increase would be to make our wealth in 1870, instead of $36,593,450,585, more than sixteen hundred millions greater, and in 1880, instead of $82,865,868,849, over three billions six hundred millions, or more than three times our present debt.
Before the close of this letter, it will be shown that the difference, per capita, of the annual products of Massachusetts and Maryland exceeds $150. As to the other Southern States, the excess is much greater. Now, if the annual products of the South were increased $150 each per capita (still far below Massachusetts) by the exclusion of slavery, then multiplying the total population of the South, 12,229,727, by 150, the result would be an addition to the annual value of the products of the South of $1,834,456,050, and in the decade, $18,344,580,500. This change would not be immediate, but there can be no doubt that with the vastly greater natural advantages of the South, the superiority of free to slave labor, the immense immigration, especially from Europe to the South, aided by the Homestead Bill, and the conversion of large plantations into small farms, an addition of at least one billion of dollars would be made in a decade, by the exclusion of slavery, to the value of the products of the South.
Having considered the relative progress in population of Massachusetts and Maryland, I will now examine their advance in wealth.
By Tables 33 and 36, Census of 1860, the value of the products of Massachusetts that year was $287,000,000; and of Maryland, $66,000,000. Table 33 included domestic manufactories, mines, and fisheries (p. 59); and Table 36, agricultural products. Dividing these several aggregates by the total population of each State, the value of that year's product of Massachusetts was $235 per capita, and of Maryland, $96, making the average annual value of the labor of each person in the former greatly more than double that of the latter, and the gross product more than quadruple. This is an amazing result, but it is far below the reality. The earnings of commerce and navigation are omitted in the Census, which includes only the products of agriculture, manufactures, the mines, and fisheries. This was a most unfortunate omission, attributable to the secession leaders, who wished to confine the Census to a mere enumeration of population, and thus obliterate all the other great decennial monuments which mark the nation's progress in the pathway of empire.
Some of these tables are given as follows:
First, as to Railroads.—The number of miles in Massachusetts in 1860 (including city roads) was 1,340, and the cost of construction $61,857,203. (Table 38, pp. 230, 231.) The value of the freight of these roads in 1860 was $500,524,201. (P. 105.) The number of miles of railroad in Maryland at the same time was 380, the cost of construction $21,387,157, and the value of the freight (at the same average rate) $141,111,348, and the difference in favor of Massachusetts $359,412,883. The difference must have been much greater, because a much larger portion of the freight in Massachusetts consisted of domestic manufactures, worth $250 per ton, which is $100 a ton above the average value.
The passengers' account, not given, would vastly swell the difference in favor of Massachusetts.
The tonnage of vessels built in Massachusetts in 1860 was 34,460 tons, and in Maryland, 7,798 tons. (P. 107).