SEC. 7. Any person who shall sell, lend, hire, give, or in any manner furnish to any slave any sword, dirk, bowie-knife, gun, pistol or other fire arms, or any other kind of deadly weapon of offence, or any ammunition of any kind suitable for firearms, shall, upon conviction, suffer the penalties prescribed in section six of this act: Provided, that nothing herein contained shall be so construed as to prohibit the owner or master of any slave from temporarily arming such slave with such weapon and ammunition for the purpose of the lawful defence of himself, his family or property.