The first question presented is whether or not the provisions of sections 18 to 23 of the act approved January 28, 1938 (Ga. L. Ex. Sess. 1937-8, pp. 214-247), authorizing corporations to merge or consolidate, apply to corporations chartered before the date of the approval of the act. The general rule is that laws prescribe only for the future, and usually will not be given a xetrospective operation. Code, § 102-104;
Walker County Fertilizer Co.
v.
Napier,
184
Ca.
861 (
*14
Turning to section 1 of tbe act, we find only banking, insurance, railroad, trust, canal, navigation, express, and telegraph companies excepted thereunder. The character of the corporations involved in the instant case was not such as was included in the foregoing exceptions. The language of section 44a is broad enough to include both corporations as being embraced within the terms of the act, including the right to merge without the unanimous consent of the stockholders; and when exceptions are mentioned, they do not come within any of those stated. The words of the section under which these two corporations claim the right to merge are as follows: “Section 18. Any two or more corporations, incorporated either under the laws of this State or under the laws of any other State or country, except banks and trust companies, may merge or consolidate into a single corporation,” etc. Here again is the language broad enough to include both corporations, with an express exception to the power granted, the exception not covering them. “It is well established that an exception in a statute amounts to an affirmation of the application of its provisions to all other cases not excepted, and excludes all other exceptions.”
25
R. C. L. 983, § 230. See
Washington
v.
A. C. L. R. Co.,
136
Ga.
638, 644 (
Is there anything in section 18 et seq. of the act approved January 28, 1938, above referred to, giving to certain corporations created before its passage the right to merge or consolidate, which violates the provisions of the constitution of the United States, or of the State of Georgia, which prohibits the State from enacting
*15
any law which impairs the obligation of a contract ? In construing the statute to mean what in the first division of this opinion we have held it to mean, counsel for the plaintiff take the position that, so applied, the act violates the constitutional provisions above referred to, in that at the time these two corporations were chartered there was no law which permitted a merger, unless by unanimous consent of the stockholders, if at all, and that when the plaintiff, owner of one tenth interest in a corporation of his own selection, is by compulsion of law commanded, at the behest of his fellow stockholders, to give up that investment in that corporation and to become a stockholder of another corporation in which his percentage of control will be much smaller, this amounts to an impairment of his original contract. The decision in Dartmouth College
v.
Woodward,
The inquiry presents itself as to whether these reserved powers to change, modify, or repeal are broad enough to justify the legislative authorization of a merger of one corporation with another, without the unanimous consent of the stockholders. The courts of a number of other States have upheld the right of the legislature to make provisions for merger applicable to pre-existing corporations, while a few have taken the contrary view. Among the cases upholding the right are Bishop
v.
Brainerd,
Winter
v.
Muscogee R. Co.,
11
Ga.
438, was based on the following state of facts: The Muscogee Eailroad Company was incorporated by an act of the General Assembly in 1845. In 1848 Winter subscribed for stock therein. In 1850 the legislature amended its charter and authorized a change in its route. Winter
*18
refused to pay his subscription, and when sued he pleaded that he was released from his obligation, because by charter amendment the route had been changed. The court held with him. On the dates mentioned the State had not asserted its reserved power over corporations. In
Wilson
v.
Wills Valley R. Co.,
33
Ga.
466, a subscriber when sued on his subscription agreement relied on the same defense as that interposed in the
Winter
case, supra, but the court held that the alteration of the charter there under consideration did not materially vary the route, and that the stockholder was not released. There is in the opinion, however, a recognition of the rule at that time of force to the effect that a material amendment of the charter will not bind the subscribers without their consent. But this case also arose before the adoption of the Code of 1863, wherein the State for the first time asserted its right to change, modify or alter. The two cases last referred to are therefore in a class to themselves. Next we shall refer to a group of four cases decided after the adoption of the Code of 1863, wherein the State first asserted what we have referred to as the reserved power. In 1866 the General Assembly passed an act incorporating the Atlanta Street Railroad Company, giving it exclusive power to use the streets of Atlanta. In 1872 the General Assembly by an act incorporated the West End and Atlanta Street Railroad Company, giving it all the powers and privileges of the former. The company first chartered filed a bill to restrain the other company from operating any railroad on any street in the City of Atlanta. The court held, among other things, that the Code of 1863 introduced a new element into the law of private corporations in this State, and that all charters granted to private corporations since its adoption are subject to its provisions; that when the company accepted the grant made by the General Assembly it did so with a full knowledge of this general law, as much as if it had been inserted in the act of incorporation; and that the complainant accepted the charter subject to the right of the State to withdraw, modify, or restrict the franchise granted to it, whenever the State should think proper to do so. Furthermore, the court said: "The power to withdraw the entire franchise granted necessarily includes the power to modify it or to restrict the exercise of it. .
.” West End &c. R. Co.
v.
Atlanta Street R. Co.,
49
Ga.
151. A similar ruling was made in
Central Railroad & Banking Co.
v.
State,
54
*19
Ga.
401. The original charter of the company was granted in 1835. The court found that it had in 1872 accepted a new charter. In 1874 the legislature passed an act relating to the taxation of railroads, the effect of which was to impose a higher tax on it than was specified in its act of incorporation. The court held that this could be done, basing its decision on the provision in the Code of 1863 hereinbefore referred to. The fact that the Supreme Court of the United States, in Central R. &c. Co.
v.
Georgia,
The fourth of this group of cases is that of
Macon & Birmingham R. Co.
v.
Gibson,
85
Ga.
1 (
The authorities above referred to and the reasoning on which they are based demonstrate, in our opinion, the correctness of the proposition that where the reserved power existed at the time of their creation, the General Assembly may authorize pre-existing corporations to merge or consolidate upon the affirmative vote of less than all of the stockholders.
There are three other Georgia cases which should be examined, to see whether any of them should constrain us to take a different view. The first is May v. Memphis Branch Railroad Co., 48 Ga. 109. The railroad was chartered in 1868, with a capital stock of five hundred thousand dollars. In 1871 an act was passed, so amending it as to provide that the company might commence work whenever one hundred thousand dollars had been subscribed. May had subscribed for stock before the amendment to the charter was passed. He was sued on his subscription agreement, pleaded several distinct defenses. The court denied him relief, because it found that he had acquiesced in what the company did, “become bound by the acts of his company, and thereby [became] disabled from setting them up as a defense.” It is true that it was stated that “The original contract between the stockholders of a railroad company, as contained in the charter, can not be materially or essentially altered by an amended charter, so as to bind the subscribers thereto without their consent.” Dealing with the question in the opinion, Judge Trippe planted himself on the ruling in Winter v. Muscogee R. Co., 11 Ga. 438, apparently overlooking the fact that the Winter ease arose before we had any such thing as the reserved powers. What was said on that point was purely obiter, since the *21 case turned on the question of estoppel. The case of Memphis Branch R. Co. v. Sullivan, 57 Ga. 240, was another suit for a stock subscription to the same road as that involved in the May case, supra. Two of the pleas were similar to those filed by May. The court held that the facts there involved did not show an estoppel; and that the amendment, being material and without his assent, released him from his subscription. No reference was made to the reserved powers, the entire discussion as to the ruling on the latter point being as follows: “Taking it altogether, it is such an alteration as materially affects the contract Sullivan made, and the principle ruled in Winter v. Muscogee Railroad Company, 11 Georgia Reports, 438, will apply to this case.” Here again is not the slightest reference to the reserved powers of the State, the fact being apparently overlooked that that important législation had intervened since the decision in the Winter case, and can not be reconciled on principle with the decision in West End &c. Co. v. Atlanta Street R. Co., 49 Ga. 151, and Central Railroad &c. Co. v. State, 54 Ga. 401, or with Atlantic & Gulf R. Co. v. State, 60 Ga. 268, and Macon & Birmingham R. Co. v. Gibson, 85 Ga. 1 (supra), decided since, all forir being by full benches, unless being a suit on a stock subscription makes a rational distinction.
The remaining case is
Snook
v.
Georgia Improvement Co.,
83
Ga.
61 (
