The St. of 1867, c. 296, authorized, and that of 1868, c. 309, § 8, required, the Newburyport bridge over tide water, between Newburyport and Salisbury, to be made a highway. The county commissioners, acting under that authority and direction, have laid it out “ as and for a public highway.” The result of these proceedings, if legal and properly conducted, is, to impose upon the city of Newburyport and the town of Salisbury the obligation to maintain and keep in repair so much of this bridge as lies within their respective limits, if “ other provision is not made therefor.” Gen. Sts. c. 44, § 1. If other provision has been made therefor, then their obligations are modified accordingly ; and each corporation is liable to indictment for neglect to repair any part of the bridge “ which it is by law obliged to keep in repair.” Gen. Sts. c. 44, § 24.
Several objections are taken to the validity of these proceedings.
1. It is argued “ that the legislature intended that the whole expense of maintaining the bridge should not be borne by the cities and towns lying contiguous, but that the county should contribute its proportion.” We do not think this to be the true construction of the statute. There were several bridges, in different parts of the county, to which the same words of the statute applied. The commissioners were empowered to impose some part of the expense of maintaining any of said bridges upon other towns “ lying near to,” as well as upon those “ contiguous to,” said bridge; or to impose a part thereof upon the county. But they were required only to impose upon such towns, or upon the county, so much of the expense “ as, in their 'udgment, may be just and equitable.” And if, in their judgment, it should not appear “just and equitable” that any part of the expense should be apportioned to a town lying near, or to the county, the statute does not require it to be done as an essential condition of a legal exercise of the power. The judgment of the county commissioners is conclusive upon the pro* *134portions to be fixed; the statute is imperative only in directing that they shall make the apportionment.
2. It is contended that the county commissioners have not fixed “ the relative proportions,” as required by the statute; and therefore that no legal responsibility results from their action. This argument proceeds upon the ground that such proportion necessarily implies a mathematical ratio, or a comparison of mathematical ratios. We do not think the statute is to be so narrowly interpreted. The “ relative proportion ” is to be fixed with reference to all the circumstances of benefit to the respective municipalities affected, and to their population, extent, and ability to bear the burden. Such a comparison does not require an absolute mathematical ratio for the other branch of the proportion. We are of opinion that it was within the power of the county commissioners to fix the proportion by assigning to each town a specific part of the bridge, if in their judgment that was just and equitable; and that such an apportionment was proper and reasonable.
3. It is urged that the statute contemplated the payment of money “in the manner and at the times prescribed” by the county commissioners, and not the charging of any city or town with the maintenance of any part of the bridge. This might appear to be so upon the mere letter of the statute. But there is no provision in the statute for the collection and expenditure of the money, and the care of the bridge. It is not charged upon the county commissioners. They are only to prescribe the manner and times of payment; and this is to be done as a part of the adjudication by which they “ determine and fix the relative proportions.” They are not to supervise the repairs, nor to sontinue to prescribe the manner and times for contributing to the expenses, from time to time, as occasion shall require. This duty is not imposed upon them by these special statutes, nor is it any part of their official duty under the General Statutes. The statute must fail of effect, if the commissioners may not prescribe the manner of payment by directing that the towns within which the bridge is situated, shall make the necessary expenditures to keep the bridge in repair, receiving from the *135county, or other towns near to the bridge, such sums, if any, as may be fixed for their proportion of the expenses so incurred and paid. This we think is clearly within the intent of the statute; and a necessary implication to enable its provisions to have the practical operation it had in view. The order once, made becomes obligatory upon all parties, to define and deter-mine their rights and duties in respect to the maintenance of the bridge. So far as relates to the manner of making the necessary expenditures, this construction makes the statute accord with the provisions of Gen. Sts. c. 44, § 2.
These considerations are sufficient for the determination of the present case. The city of Newburyport and the town of Salisbury are liable to conviction upon indictment, for the want of repair of so much of the bridge as each was bound to repair within their respective limits; and it is admitted that the bridge was so defective throughout its entire length. As the dividing line between them is stated to intersect the bridge, some part of it must be within each. It did not appear that the whole of the three fourths part of the bridge, apportioned to Newburyport, was in fact included within the boundaries of that city. The jury were instructed that it was the duty of the city to keep that part of the bridge described in the indictment in repair. We suppose it was intended to apply this ruling to such part of the bridge as lay without the limits of Newbury' port, as well as that within its limits, if there were any such part assigned by the commissioners to be kept in repair by that city. And we think the ruling was correct in this respect. The duty to keep ways and bridges in repair, imposed by Gen. Sts. c. 44, § 1, relates only to such as are situated within the city or town ; but the liability to indictment under § 24 extends to any of the ways or bridges which the town is by law obliged to keep in repair. Although the general law provides for the maintenance of all roads and bridges, by imposing the duty upon each town to support those that are within its limits, yet the legislature may undoubtedly, by general provision or by special statute, modify this' general rule, in particular cases, in order to make the distribution or the burden more equal than it might other*136wise prove to be in its operation. This it does by authorizing or requiring the county to assume a part of the expense of certain roads or bridges; thus indirectly imposing upon all the other towns in the county a part of the burden which, by the general rule, would fall upon the town within which the road or bridge was situate; or by authorizing a part of such expense to be imposed upon particular towns near to or benefited by such road or bridge. The power to impose the burden by way of contribution in money involves the right to do so by making it the duty of the town to keep its portion of the way or bridge in repair. And from this duty to maintain and repair flows the liability for defects, whether by action for damages or by indictment. Malden & Melrose Railroad Co. v. Charlestown, 8 Allen, 245. Judgment on the verdict.*
This case was orgueil at Boston, November 25, before all the judges but Colt, J.
A similar decision was made in the case of Commonwealth vs. Inhabitants of Salisbury, argued at the same time by the same counsel.