and some others of minor importance, (the cost of the whole amounting to $19,190) in fact, constituting the only perishable part of the road; and allowing that this will require an expenditure equal to ten per cent per annum, on its cost, to renew and keep it in repair, will amount to $1,919 -- a mere nominal sum for repairs, on so great a work. This permanency in the character of the work, will unquestionably be a consideration of great importance, with those who wish to have their money invested in stocks that will yield them an annual return of profits instead of having it consumed in continual repairs. The grading for that portion of the route which lies between the village of Auburn and Seneca Falls, is through gravel and clay soils; for the remainder of the distance it is generally through loam, sand and gravel, and at three several points some slight lime-rock cuttings, but not more than will furnish the necessary quantity of stone to be used for culverts and bridge abutments, in their vicinity. The character of the masonry, I have estimated to be of plain, rough, hammer dressed stone work, laid in quick lime mortar. The following estimates are made for grading and masonry for a double track -- the first track to be laid immediately, the second track as soon after as requisite. Considering this as one of the links in the great chain of Western Railroads, from Boston to Buffalo and the "far West," the estimates are made on a scale of corresponding character and magnitude to accommodate the business of this great and increasing thoroughfare; and nothing short of a double track will, in my opinion, be adequate for any great period. This is indicated by the fact, that the travel on the Utica and Schenectady Railroad, (which forms another link in this same chain) already requires the second track, to do the business of carrying passengers only; and the fact, that the Tonawanda Railroad, (from Rochester to Batavia) with its present accommodations, having only a single track, is inadequate to the business, although trains of cars run day and night. The subject of wooden superstructure, from its importance, has occupied much attention. From the experience of the present day, there can be no question, that a combination of timber and iron makes, under all circumstances, the preferable road for this climate.