Section XXI. And it is hereby enacted, that unless a contrary intention shall appear by the will such real estate

XXI. And it is hereby enacted, that unless a contrary intention shall appear by the will such real estate and interest therein as shall be comprised or intended to be comprised in any devise in such will contained, which shall fail or be void by reason of the death of the devisee in the life time of the testator, or by reason of such devise being contrary to law, or otherwise incapable of taking effect shall be included in the residuary devise (if any) contained in such will.