L.1929, c. 328, p. 745, entitled “A supplement to an act entitled “An act concerning unpaid taxes, assessments and other municipal charges on real property, and providing for the collection thereof by the creation and enforcement of liens thereon’ (Revision of 1918),” approved May sixth, one thousand nine hundred and twenty-nine, saved from repeal. [This act validates, confirms and makes absolute titles derived through the so-called Martin act (L.1886, c. 112, p. 149) when the deed given therefor has been on record for more than thirty years.]