The Dayton and Michigan Railroad was completed last fall, placing us within a few hours' ride of the Queen City of the West. This is justly regarded as a most important route to our city, and will develop new features to some of our leading business interests. The consumer of our State will have the benefit of lower prices for the products of Kentucky, Tennessee, Louisiana, and the West Indies. The want of direct communication between Detroit and New Orleans has long been felt. Sugars and molasses can now be laid down here for fifty cents per 100 lbs., including all charges from New Orleans, via the Mississippi and Ohio Rivers, and D. and M. Railway, giving us, in a word, the benefits of as low freights in winter as in summer. With the cost of transportation thus reduced to a merely nominal standard, prices of Southern products will be upon an average no higher here than in Louisville. It is more than probable, nay, quite certain, that the advantages which must ultimately accrue to the State from our connection with Cincinnati _per se_, if not so general, will be even more marked and important than those to which we have above referred. The prices of provisions will be equalized, giving our lumbermen and miners the benefit of reduced rates throughout most of the year, and when speculation is rampant, and the price of pork, the great staple of our neighbors, reaches an extreme figure--as has been the case for two successive seasons, and will be the case again--our farmers will reap the benefit of the movement. The growth of Cincinnati is altogether without parallel in the world, taking into account the character of that growth--its _quality_, so to speak. All its great interests, particularly its manufactures, have kept pace with its numerical increase. It is indeed difficult to determine whether manufactures or commerce is most intimately identified with its prosperity. The connection with her will give us new and desirable customers for some of our surplus products, particularly our choice lumber. The entire line of the Flint and Pere Marquette Railroad, as located, is 172-1/2 miles; track laid and completed, 7-3/4 miles; additional length graded 24-1/2 miles, the ties for which have all been delivered. It is thought that hereafter twenty miles per year will be completed without difficulty until the whole is completed. This road will be important in developing the resources of a very rich tract of country.