All probates of deeds or other instruments of writing, touching or concerning any lands, tenements or hereditaments situate, lying and being in any part of this commonwealth, taken or made before the mayor or recorder of the city of Philadelphia, prior to the passage of the act of January 9, 1817¹ which would have been good and valid if said act of January 9, 1817, had been in force at the time of the taking or making of said probates, shall be and are hereby declared to be as good and effectual, and may be recorded in the proper county, in like manner as if said probates had been taken and made subsequent to the passage of said act.