Every transfer or other instrument shall be deemed of the same efficacy as if under seal, and when signed by the proprietor and registered shall be as valid and effectual to all intents and purposes for conveying, passing or conferring the estates, interests or rights expressed to be thereby transferred, leased or created respectively, as a deed duly executed and acknowledged by the same person would have been under any law heretofore or now in force, or as any other form of document would have been either at law or in equity.