The county commissioners have been called out and have made an adjudication in regard to the public crossings and alterations of highways between Greenfield and Shelburne Falls.

The whole work below the falls is under good progress, and is being prosecuted with great vigor. The laying of the track can be commenced as early in the spring as the season will admit, and its extension to Shelburne Falls, may, in the opinion of the engineer, be expected early in October.

It appears from the foregoing, that of the work now in progress on the road and tunnel, their is performed by contract,—the construction of the railroad from Greenfield to the East End of the tunnel; the enlargements east and west in the tunnel at the West Shaft; the excavation of the New Shaft; and the arch masonry and excavation at the West End; while the work at the East End, at the Central Shaft, the heading and lifting at the West Shaft, the lifting at the New Shaft, and the work at the brickyard has been performed by the State. No criterion has been afforded enabling the Committee to determine upon the comparative economy of the different modes of operation.

The commissioners in their able report in 1863, speaking of the manner of constructing the tunnel, say: "It would not be wise nor according to any precedent for the State to expect to get the work done at the contract price if it should turn out to cost more. It would certainly get no abatement if the price was found to be exorbitant. We are clearly of the opinion that it should not be constructed by contract, excepting in so far as parts of the work may be in detail to the men actually at work upon it, and even such contracts should' not be permanent in their character." That the commissioners in April last entertained the idea of inaugurating and continuing the contract system so far as the same should prove economical for the State, satisfactorily appears in the following letter:

BOSTON April 25, 1866.

Hon. Tappan Wentworth, Chairman of Hoosac Tunnel and Troy and Greenfield Railroad Committee.

Dear Sir:—Hearing that questions have arisen in regard to the propriety of contracting the work upon the Hoosac Tunnel, it may not be improper for me to say that that subject (contemplated in the Act of 1863,) has for a long time engaged the serious attention of the commissioners, who have already a contract for constructing a portion of the West End, before the governor and council, awaiting their approval under section 3 of chapter 214 of the Acts of 1863.

When the economic value of their new facilities shall be demonstrated, they expect further to avail of this system 80 far as the interest of the State (as represented by the rapid, economical and certain progress of the work,) shall warrant.

While the high prices now prevailing will probably render the letting of large jobs at this time injudicious, they are not of short contracts, or of letting portions of the work to the miners by the piece.