By the Court,
PAINE, J.This action was brought by the plaintiffs to restrain the sale of their lands for taxes. The *400lauds in question are situated in several tracts wbicb were adjacent to the city of Eacine previous to March 6th, 1856, an(j which the appellant claims to have been annexed to the city by an act approved on that day. The plaintiffs object to the legality of the taxes assessed by the city upon these lands, first, because the act was unconstitutional and wholly inoperative; and second, for several other reasons not inconsistent with the validity of the act. The conclusion to which we have come upon the first objection, will preclude the necessity of considering the others.
The plaintiffs claim the act to have been unconstitutional for two reasons. First, because it would leave the two assembly districts, which by the previous apportionment law were composed, one of the city of Eacine, and the other of the towns of Eacine, Caledonia and Mt. Pleasant, not bounded by county, town, precinct or ward lines, as required by section 4, art. IY of the constitution. This objection assumes that it was incompetent for the legislature to alter the assembly districts until the time for the next apportionment, as prescribed by the constitution, and this assumption is necessary to the validity of the objection. For if the assembly districts might be altered, and if by the annexation of the tracts in question to the city, they thereby became a part of the city to all intents and purposes, then they would be a part of the assembly district composed of the city, and cease to be a part of that composed of the towns. So that both districts would still be bounded by town lines, those lines being different, however, from what they were when the districts were organized. The validity of this objection depends, therefore, on the question whether it is within the power of the legislature, by any means, intermediate two apportionment laws, to transfer any part of the territory in one assembly district to another.
It has been held in Massachusetts and New York, under their constitutions, that this could not be done. 6 Cush., 575, 578; 2 Gray, 84; 80 Barb., 849. But the constitution of New York, after providing for an enumeration of the people and an apportionment of representatives at stated periods, expressly provides that “ the apportionment and dis*401tricts, so to be made, shall remain, unaltered until another enumeration shall be taken,” &c. The decision there based upon this provision. The constitution of Massachusetts provides for an enumeration once in ten years, and determines the number of representatives to which any town or district is entitled by the number of “rateable polls,” and having provided for the ascertainment of this number once in ten years, declares that it “ shall remain fixed and unalterable for the period of ten years.” Their decisions were based upon the limitation derived from these provisions.
But in our constitution there is no express prohibition against an alteration of assembly districts. And whatever limitation exists upon the power of the legislature in that respect, is to be derived from the general scope and objects of the provisions of the constitution concerning the apportionment of senators and representatives. But it may well be said that these furnish such a limitation, and that when the instrument provides for an apportionment and organization of districts once in five years, this implies that it shall not be done at any other time. This would seem clear, with respect to a general apportionment; and perhaps the same implication would extend to any partial re-organization of assembly or senate districts, by any law passed directly for that purpose. Whether it would or not we shall not now decide, but shall assume for the purposes of this case that it would.
But assuming that, we still think the implied prohibition does not extend to such changes in these districts as may result incidentally from the exercise of the acknowledged power of the legislature to organize counties, towns and cities, and change the boundaries of such as are already organized. Of the existence of this power there is no-question. The constitution imposes no express limitation upon it material to this inquiry. The occasions for its exercise are constant and frequent, having no relation to or connection with the stated periods prescribed for apportionment. And we think the provisions upon the latter subject should be deemed to have been adopted in contemplation of the existence of this power, and that therefore the implied prohibi-*402^°n "^idi may ^ddy be derived from tbem, is so qualified as not to include changes in these districts arising incidentally from an increase or decrease by the legislature of the towns, cities or counties of which they may be composed. The restriction is upon the power to apportion and organize these districts by laws having that object alone. But it is subject to the power to organize and change the boundaries of the political divisions of the state.
This conclusion may seem liable to the objection of permitting that to be done indirectly which could not be done directly. But it really is not so, if we are right as to the extent of the implied prohibition to be derived from the provisions concerning apportionment. Eor then the prohibition included only a direct re-organization of these districts, and left them subject to such incidental changes as might occur by changes in the cities, towns or counties so constituting them. This qualified prohibition may well exist in connection with the intent to leave the other power unimpaired. And when the framers of the instrument carefully avoided inserting any express prohibition, like that in other constitutions, we do not feel warranted in extending an implied one, so as to restrict an acknowledged power of the legislature, entirely independent of the subject matter out of which the implied prohibition arises. This conclusion is supported by the opinion of STRONG, J., in Rumsey vs. The People, 19 N. Y., 41, and by the dissenting opinion of Allen, J., in Kinney vs. Syracuse, 30 Barb., 368, which we think would have been adopted by the whole court in that case, if their constitution had been similar to ours.
Nor do we think any valid argument against it can be derived from the schedule to the constitution, by which the first senate and assembly districts were established. In section 12 it is declared, that the town of Centre with others in Eock county should form an assembly district, “provided that if the legislature should divide the town of Centre, they might attach such part of it to the district lying next north, as they should deem expedient.” At the close of the section is the following provision: “ The foregoing districts are subject, however, so far to be altered, that where any new *403town shall be organized, it may be added to either of the adjoining assembly districts.”
It might be said that the power of making certain specific changes being expressed, that of making all others was ex-eluded, and that these clauses assume the necessity of a specific authority to make such changes in the districts as might result from organizing towns or dividing them. This argument would undoubtedly be good, with respect to districts thus established by the constitution itself. The provisions allowing such changes, were, it would seem, introduced for the reason that it might otherwise be said that districts which the constitution had itself prescribed, could not be changed by the legislature. Therefore they expressly allowed those districts to be changed incidentally, in the exercise of the power of dividing and organizing towns. This is a recognition of the necessity of such a power. Yet the instrument contains no provision for even such changes, in respect to districts to be thereafter established by the legislature. This can only be accounted for upon the supposition that it was assumed that no express authority was necessary to authorize such changes. The express power of change being confined, therefore, to the districts established by the constitution itself, the implied exclusion extends only to them.
We are therefore of the opinion that it is competent for the legislature to change incidentally the boundaries of assembly districts, in exercising its power to change the limits of cities, towns, &c.; and that if a part of a town in one district is annexed to a city which constitutes another, unless there be some exception or reservation in the law itself, it becomes a part of such city for all purposes for which the legislature could annex it. So that the previous law constituting that city an assembly district would apply to everything that became absolutely a part of it, just as an incum-brance upon land attaches to subsequent improvements upon it, which become a part of the realty. It follows that we should not hold the law unconstitutional on account of the first objection.
The second objection is that the act provides that the ag*404ricultural and farming lands annexed sbonld be taxed at a different and less rate than other lands in tbe city. This nmst be sustained under our decision in the case of Knowlton vs. the Supervisors of Rock Co., 9 Wis., 410. And the only question left is, what effect the invalidity of this provision should have upon the operation of the statute. It is undoubtedly true that parts of a statute may be unconstitutional, and yet other parts, capable of being executed independently, held valid. But the counsel for the plaintiff contends that where parts of a statute are unconstitutional and other parts valid, the former being evidently designed as compensation for or inducements to the latter, so that the whole taken together warrant the belief that the legislature would not have passed the valid parts alone, then the whole act should be held inoperative. This position is fully sustained by the case of Warren and others vs. Charlestown, 2 Gray, 84, and seems to us to rest upon solid reasons. We think also it is fairly applicable to this case.
The first section of the act (chap. 83, Pr. Laws of 1856) provides that the tracts in question shall be annexed to the city. The second defines the new boundaries of the city, and then follows a proviso that the farming and agricultural lands annexed should be exempt from certain taxes, and should be taxed for city and ward purposes only at the rate of one half of one per cent. There is no doubt that in many instances, by the annexation of farming lands to a city, hardships are inflicted upon their owners by the increased rates of taxation to which they are subjected. If they are annexed, they must be taxed as other lands in the city, and that is a matter proper to be considered by the legislature in determining whether they shall be annexed. In this act it is evident the legislature had it under consideration, and that they annexed these lands with the idea that they might protect them against such hardships by a proviso for a less rate of taxation. The proviso was clearly intended as a compensation for the annexation, and stronger language could not well be selected to show that the legislature intended the one to be subject to the condition stated in the other, and that they would not have annexed these lands unless they had *405supposed that effect could be given to tbe proviso. For these reasons we think the principle stated applies, and act should be held inoperative.
It follows that the lands in question were not a part of the x x city of Eacine, and that the taxes sought to be resisted were illegal.
The judgment of the circuit court is affirmed, with costs.