It shall be lawful for the owner or owners of land, timber or bark, or for any person or persons having an interest therein, to grant, bargain and sell, or contract to sell, by deed, conveyance or contract in writing, signed by the grantor or grantors therein, and proved or acknowledged by them, as now required by law of this commonwealth for the signing and acknowledging of deeds, all or any right, title, claim or interest such grantor or grantors may have in or to any standing or growing timber, or the bark thereon, upon any lands in this commonwealth; and any such deed, conveyance or contract shall be taken and deemed as a deed, conveyance or contract conveying and vesting an interest in land.