1. Where a petition seeking recovery for rent on an oral contract of lease in the Civil Court of Fulton County is amended (November 22, 1963) pursuant to an order of the court sustaining a general demurrer and special demurrers with leave to amend, and where a general demurrer to the petition as first amended is overruled and special demurrers to the petition as first amended calling for a more particular description of the property involved are sustained (which demurrers were filed November 27, 1963) and a second amendment is filed (January 28, 1964) to meet the ruling on the special demurrers by elaborating on the description of the property, such second amendment does not materially change the cause of action and does not open the petition so amended to a renewed general demurrer to the petition as amended or to additional special demurrers (both filed February 6, 1964) to portions of the first amendment. Code 81-1312. See General Tire &c. Co. v. Brown Tire Co., 46 Ga. App. 548 (2a) (168 SE 75); Allen v. City of Atlanta, 86 Ga. App. 476 (71 SE2d 871); LaHoste v. Yaarab Mounted Patrol, 89 Ga. App. 397 (1) (79 SE2d 570); Johnson v. Ellington, 196 Ga. 846, 847 (4) (28 SE2d 114); Wardlaw v. Southern R. Co., 199 Ga. 97, 99 (4a) (33 SE2d 304); Pritchett v. Ellis, 201 Ga. 809, 811 (41 SE2d 402).

3. While the specific grounds of a general demurrer may be amplified by an amendment which states them more fully, Stovall v. Caverly, 139 Ga. 243 (1), supra, it cannot be amended after it is overruled, or after being overruled, renewed to a petition after amendment which does not open the petition to demurrer. See Central of Ga. R. Co. v. Waldo, 6 Ga. App. 840, 842 (6) (65 SE 1098).

4. The Act of 1952 (Ga. L. 1952, p. 243, amending 81-1001 of the Code of 1933), providing that an order on demurrers allowing time to amend "shall not be subject to exception or review" was declared unconstitutional by the Supreme Court in Northside Manor, Inc. v. Vann, 219 Ga. 298 (133 SE2d 32), and the cases of this court and the Supreme Court applying said amendment are not authority for any ruling contrary to those herein made.

5. The trial court in the instant case did not err in overruling and disallowing the general and special demurrers filed February 6, 1964, and there being no assignment of error on the overruling of the prior demurrers, the judgment is