10 Appointments by will to be executed like other wills, and to be valid, although other required solemnities are not observed.
No appointment made by will, in exercise of any power, shall be valid, unless the same be executed in manner herein-before required; and every will executed in manner herein-before required shall, so far as respects the execution and attestation thereof, be a valid execution of a power of appointment by will, notwithstanding it shall have been expressly required that a will made in exercise of such power should be executed with some additional or other form of execution or solemnity.