All wearing apparel of the tenant and his family, all Bibles and school books in use in the tenant's family, all sewing machines and other tools of trade used and owned by private families, and all uniforms, arms, ammunition and accoutrements of any commissioned officer or enlisted personnel of the National Guard or of the armed forces of the United States, shall be exempt from levy and sale on any landlord's warrant. Nothing contained in this section shall be construed to exempt sewing machines kept for sale or hire.