By P. S. 713, for each fiscal year beginning with the first day of January, a tax is assessed upon the property and corporate franchise of each person or corporation owning or operating a railroad located in whole or in part within this State, at the rate of one per cent of the appraised value thereof, payable semi-annually. By see. 714, for each such year a person or corporation thus owning or operating a railroad so located, may, in lieu of the tax assessed in the preceding section, pay to the state in the manner and at the times specified in the third following section (717) two and one-half per cent of such part of the entire gross earnings derived from all sources as does not exceed two thousand dollars per mile of the roadbed of such railroad located within this State, with provisions for graduated rates according to specified increase in the gross earnings per mile. And by sec. 717, such person or corporation accepting the provisions of section 714 shall make returns of the gross earnings of such railroad for semi-annual periods specified, and shall within thirty days thereafter pay to the State Treasurer the percentage of such gross earnings provided in the section last named.
One question is whether under section 714 the tax is to be rated according to the gross earnings per mile for the full fiscal year, or only for the semi-annual period on which the particular payment is to be based. The meaning of the statute in this respect being in doubt, we consult the legislative history of the law taxing railroads in this State during the last quarter of a century and any contemporaneous practical construction given by the officers charged with the application and enforcement of its provisions, — all of judicial notice, — as aids in arriving at the true intention of the statute under consideration.
The first enactment of a similar nature that has come to out attention is No. 1, Laws of 1882, of which sec. 11 provided that every corporation, person or persons owning or operating a railroad in this State should pay a tax on the entire gross earnings of such railroad if situated wholly within this State; and if situated partly within and partly without the State the tax should be upon such proportion of the entire gross earnings as the mileage of the trains run in the State bore to the mileage of all trains run on the entire line of road. By sec. 12 the tax was to be rated according to the earnings per mile of road in this State, and assessed at the rate of two per cent on the first two *512thousand dollars a mile of total earnings if less than that sum; and at a graduated rate on the gross earnings above that sum, in this respect essentially like the law now in force. And by sec. 13 the tax was payable one-half semi-annually, and to be based upon the gross earnings during the six months terminating at times specified. The law of sec. 12 was reenacted with some additions as a part of No. 5, Laws of 1884; however as far as material here the law continued the same.
The tax thereunder was not in terms characterized as either annual or semi-annual; yet from the time of its original enactment until the' fall of 1890, when the law so far as it sought to tax earnings derived from interstate commerce was declared unconstitutional (Vermont & Can. R. R. Co. v. Cen. Vt. R. R. Co., 63 Vt. 1; S. C. 159 U. S. 630, 40 L. ed. 284), the successive Commissioners of State Taxes construed the statute as laying a semi-annual tax and acted upon this construction in its execution.
No. 3 of the Laws of 1890, entitled “An act to provide a revenue for the payment of State expenses,” was approved November 26 and took effect from its passage. That act was a revision of the ivhole subject-matter of taxation for the purpose named in the title and was intended as a substitute for the law of 1882 and amendments and additions thereto; and the latter law, as far as it related to taxes on the gross earnings of railroads, — beyond this we have no occasion to speak, — was by implication repealed thereby (Barton National Bank v. Atkins, 72 Vt. 33), except that by section 46 of the new act the liabilities' of companies and persons to pay to the State taxes which accrued prior to July 1, 1890, under the law then existing Avere not to be affected. That the Legislature intended such a repeal of the previous law is clearly shown by thus expressly continuing it in force as to the liabilities for taxes imposed under it.
By the act of 1890 provision was made for the assessment of a tax upon the appraisal of the property, taking into consideration the corporate franchise, of a railroad in this State, payable semi-annually (sec. 14), with the further provision that in lieu of the tax thus assessed the owner or operator of such railroad might “annually” pay to the State a named arbitrary percentage on the gross earnings thereof. Sec. 17. And if the provisions of this optional privilege were accepted, semi-annual returns of the gross earnings were required, and within a time *513limited thereafter the percentage .paid for the period covered by said returns. Sec. 18. The law of these sections became sections 19, 20, and 21 of Act No. 20,- Laws of 1902, without change material here, except that in section 19 the tax on the appraisal was in terms also to be “annually” assessed. Nor so far as material here was the law of 1902 changed by No. 29, Laws of 1904, except that instead of the provision being as before that such optional tax might be paid ‘ ‘ annually, ’ ’ it was “for the fiscal year beginning with the first day of January, 1905, and for each year thereafter”; and if such option for the first six months of the year was not accepted, it could not be for the rest of the year. Sec. 5. In 1906 the statute was amended to read as it now does with some immaterial change of language in the general revision (Laws of 1906, No. 37, see. 1, P. S. 714). The phrase, “For the fiscal year,” etc. was retained, and an optional privilege was given to pay graduated rates on the gross earnings, in principle like the law of 1882 and 1884, in lieu of the regular tax assessed on the appraisal, with the further provision, — which was first contained in the Act of 1904, — in effect limiting the right of option to its exercise for the entire year.
It is well settled that where the language of a statute is ambiguous and susceptible of two reasonable interpretations weight is given to the doctrine of contemporaneous practical construction. In re National Guard, 71 Vt. 493; State v. Stimpson, 78 Vt. 124; Houghton v. Payne, 194 U. S. 88, 48 L. ed. 888; Whittemore v. People, 227 Ill. 453, 10 Am. & Eng. Ann. Cas. 44. Under this doctrine the practical construction given to the law of 1882 and 1884 by the administrative officers whose duty it was to carry it into execution, for the length of time before stated, would be entitled to great respect and perhaps would be controlling in the interpretation of the statute here under consideration, did not the latter,- viewed in the light of legislative history and the practical construction given to the earlier law, contain indicia of an intention by the Legislature to give it a different meaning. As before observed, the law of 1882 and 1884 was without terms expressly characterizing the tax assessed thereby as either annual or semi-annual as distinguished from the other, and the language in this respect may well be said to have been of doubtful import. It is presumed that the Legislature was informed of this law and of the practical con*514struetion it had received, giving the tax a 'semi-annual character, when the subsequent acts were passed. Suth. Stat. Constr., 2nd ed., secs. 403, 499. In the light of this information it enacted the law of 1890, expressly providing that payment of an arbitrary percentage on the gross earnings might “annually” be made in lieu of the tax on the appraisal; and the same language was used in the Act of 1902. In the amendment of 1904, the language was changed from the word “annually” to “For the fiscal year beginning,” etc., words equally or more definite, with a further provision declaring that no right to exercise such option in the second half of the year should exist except that it had been exercised in the first. Thus by the two provisions an intention is indicated to make the optional tax an annual one rather than semi-annual. The same provisions were carried forward into the law of 1906 which changed the previously existing optional right, “for the fiscal year beginning,” etc. to pay an arbitrary rate per cent on the gross earnings, to the same right “for the fiscal year beginning,” etc., to pay graduated rates on the gross earnings in lieu of the regular tax on the appraisal, also for the fiscal year. In view of the law of 1882 and 1884 and its known practical construction, the insertion of the two above named provisions in the subsequent acts as before noticed, can reasonably be accounted for only as an intention by the lawmakers to make the tax an annual one instead of semiannual, as by the earlier law under the construction given. To hold that such was not the effect would be to render the words so inserted without force, a holding not in harmony with the elementary rule of construction that effect must be given, if possible, to every word, clause, and sentence of a statute. And the tax being for the fiscal year, to make the provision therefor effectual, the rate, by implication, is to be determined by the gross earnings during the same period. The phrase “in the manner and at the times specified in the third following section” (P. S. 717), does not indicate otherwise; for that section provides only for returns of the gross earnings on which to base the semi-annual payments, and specifies the times within which such payments shall be made.
We hold therefore that the rate is to be determined upon the gross earnings during the fiscal year for which the tax is to be paid.
*515It is said, however, that as a practical fact the gross earnings of a railroad are not uniformly the same between the two six months periods of the year, consequently under the above construction there might be an excess over the true amount by law to be paid at the end of the first semi-annual period; that it is hardly probable that the Legislature has passed a law taking more of the taxpayer’s money than it ought, for the sake of returning it at the end of the year; and that on the other hand, if the rate is determined by the gross receipts for each six months’ period, there can be no such thing as an over-payment during the fiscal year. It is true that if the rate is determined by the gross earnings for semi-annual periods, the exact amount required by law to be paid can always be ascertained, while under the construction given there may be an overpayment at the end of the first half of the year, or the amount paid may be too small. Yet the force of this argument is in support of the construction here given, since by making provision for the refunding of any excess paid (P. S. 695), and for an additional tax in case the commissioner finds that owing to the incorrectness of a return, or any'other cause, a tax paid is too small (P. S.. 694), manifestly the Legislature contemplated that there might be such a condition of things as to make the law of these sections applicable.
The facts of record show that the defendant in each case duly and seasonably elected to accept the provisions of section 714, and that the Rutland Railroad Company paid to the State the amount of the tax computed with the rate determined by. the gross earnings of the respective semi-annual periods on which the several payments were based, instead of the amount computed with the rate determined by the gross earnings for the full fiscal year, as required by the statute under the construction here given; that the Central Vermont Railway Company computed the tax with the rates determined in the same way, and paid to the State the major part, but not the full amount, of the tax so computed.
The State contends that since in each case the payments made were based upon an erroneous method of computation, the defendants have not legally availed themselves of the option, and that consequently they are liable for taxes on the appraisal of their property and corporate franchises under section 713. In support of this position it is argued that section 714 creates *516no legal liability on the defendant’s part to pay the sum therein provided for in lieu of the tax on the appraisal; that a payment thereof is purely voluntary; and that no method is provided -whereby the State may enforce it. But the fact that payment upon the gross earnings was optional did not in itself make the payments so made voluntary. The defendants were by statute obliged to pay a tax, and it would be on the appraisal unless they accepted the option given them also by statute to pay on the gross earnings. The payment of the percentage specified was none the less mandatory under the optional provision when accepted than was the tax on the appraisal had the option not been exercised. In either form, money paid is a tax.
In principle-the effect of this optional right is not unlike that under consideration in Baker v. Sherman, 77 Vt. 167. There in a former suit between the same parties upon the same cause of action, the defendants after verdict moved in arrest of judgment, which motion was finally sustained in this Court, and the declaration held bad. The Court granted leave to amend and a new trial on terms imposed, and ordered that if a new trial was not wanted on the terms imposed judgment should be arrested. The case being remanded to the county court, the plaintiffs elected to submit to an arrest of judgment rather than to amend the writ and proceed to a new trial on the terms imposed. A new suit was then brought for the same cause of action, and by the plea of the statute of limitations and pleadings subsequent thereto, the question whether the plaintiffs voluntarily abandoned the former suit was put in issue. The defendants contended that the election between the two courses made the election to submit to an arrest of judgment a voluntary abandonment of the suit. In holding to the contrary, the Court said: “But it is to be observed that this was not a case in which the plaintiffs could do either or neither of two things. They sought to hold the verdict which they had obtained but were compelled to abandon it and to take one of two courses, both of which were against their will. Under such circumstances the taking of one course rather than the other does not make the course taken voluntary in any proper sense. * # * In submitting to an arrest of judgment when in a dilemma not of their own seeking but forced upon them, the plaintiffs were acting under judicial compulsion.”
*517Section 694 of the statute, to which reference has already-been made, provides ample remedy by requiring the commissioner, • in case he finds that owing to the incorrectness of a return, or any other cause, a tax paid is too small, to assess an additional tax sufficient to cover the deficit, and if the additional assessment is not paid within the time therein specified, the person or corporation against whom it is assessed becomes liable to the same penalties as for neglect to pay annual or semiannual taxes.
It follows that on the agreed cases the State is not entitled to recover in either suit.
In each case judgment reversed and judgment for the defendant ivithout costs.