This litigation has been before this court on three previous occasions, in the report of which a full statement of the controversy may be found.
Gehr v. Atlanta,
189
Ga.
701 (
We are not to be understood, however, as intimating that had the point been made in time, it would have presented a question of any seriousness. No reasons are advanced in the brief of the plaintiff in error why the section is unconstitutional, nor are any authorities cited in support of such contention; but if it were to be conceded that the third section of the act contained matter different from what is expressed in the title, the act itself would have to be construed, bearing in mind the provisions of the Code, § 102-104, which in part declares, “Laws prescribe only for the future; they can not impair the obligation of contracts, nor, usually, have a retrospective operation.” And if the quoted language be applied, the extension of time given in the act for the redemption of land sold at tax sales could not affect the sale here involved; for that took place before the passage of the act. Compare
Walker County Fertilizer Co.
v.
Napier,
184
Ga.
861 (
