By the Table 35, Census of 1860, the total value of all the property, real and personal, of the Free States, was $10,852,081,681, and of the Slave States, $5,225,307,034. Now, the product, in 1860, of the Free States, being $4,150,000,000, the annual yield on the capital was 39 per cent.; and, the product of the Slave States being $1,140,000,000, the yield on the capital was 22 per cent. This was the gross product in both cases. I have worked out these amazing results from the Census Tables, to illustrate the fact, that the same law, by which slavery retarded the progress of wealth in Virginia, as compared with New York, and of Maryland and South Carolina, as compared with Massachusetts, rules the relative advance in wealth of all the Slave States, as compared with that of all the Free States. I have stated that the statistics of commerce, omitted in these tables, would vastly increase the difference in favor of the Free States as compared with the Slave States, and of New York as contrasted with Virginia. I shall now resume the latter inquiry, so as to complete the comparison between New York and Virginia. By commerce is embraced, in this examination, all earnings not included under the heads of agriculture, manufactures, the mines, or fisheries. RAILROADS.--The number of miles of railroads in operation in New York, in 1860, including city roads, was 2,842 miles,[3] costing $138,395,055; and in Virginia, 1,771 miles, costing $64,958,807. (Census Table of 1860, No. 38, pp. 230 and 233.) Now, by the same Census Report, p. 105, the value of the freights of the New York roads for 1860 was as follows: Product of the forest--tons carried, 373,424; value per ton, $20; total value, $7,468,480. Of animals--895,519 tons; value per ton, $200; total value, $179,103,800. Vegetable food--1,103,646 tons; value per ton, $50; total value, $55,182,000. Other agricultural products--143,219 tons; value per ton, $15; total value, $2,148,055. Manufactures--511,916 tons; value per ton, $500; total value, $391,905,500. Other articles--930,244 tons; value $10 per ton; total value, $9,302,440. Grand total, 4,741,773 tons carried; value per ton, $163. Total values, $773,089,275. Deducting one quarter for duplication, makes 3,556,330 tons carried on the New York roads in 1860; and the value, $579,681,790. The values of the freights on the Virginia roads, as estimated, is $60,000,000, giving an excess to those of New York of $519,681,790, on the value of railroad freights in 1860. The passenger account, not given, would largely increase the disparity in favor of New York. CANALS.--The number of miles of canals in New York is 1,038, and their cost $67,567,972. In Virginia, the number of miles is 178, and the cost $7,817,000. (Census Table 39, p. 238.) The estimated value of the freight on the New York canals is 19 times that of the freight on the Virginia canals. (Census.)