Machines of Class 11 have a cylinder bed and drop feed and are designed for stitching heavy tubular shaped articles in cloth or leather. These machines are used in the manufacture of mail bags, coal bags, nose bags, ore bags, military boots, carriage dashes and a great variety of similar articles. They have one needle and an oscillating shuttle and make the lock stitch. Machine No. 11-8 has a reversible feed up or off the arm and is designed for work in cloth. Machine No. 11-11 feeds across the arm and is used for work in leather. Machine No. 11-12 feeds across the arm and is intended for work in cloth. Machine No. 11-13 feeds up the arm and is designed for work in leather. Machine No. 11-14 feeds up the arm and is designed for work in cloth. Machines No. 11-15 and 11-22 feed across the arm and are designed for use in the manufacture of carriage dashes and similar articles in leather. Machines Nos. 11-16 and 11-26 each have* a vibrating needle. They are intended for overseaming long boot legs or other tubular shaped articles while feeding up the arm, and are used for straight stitching while feeding across the arm. Machine No. 11-17 feeds up or across the arm and is designed for stitching military boot legs and other tubular shaped articles. Machine No. 11-18 feeds across the arm and has alternating pressers and is used for work in leather. Machine No. 11-19 feeds across the arm and has a vibrating presser and is used for work in leather. Machine No. 11-20 feeds across the arm and is designed for quilting bed covers, binding, etc., and is useful for other work in cloth. Machine No. 11-21 feeds up the arm and is used for work in cloth or leather. Machine No. 11-23 feeds up the arm and is designed for stitching fine boot legs and other tubular shaped articles in light and medium weight leather. Machines Nos. 11-24 and 11-25 each have a vibrating needle and are especially designed for making eyelets or grommet holes in sails, tents, canvas bags, tarpaulins, etc. These machines can also be used for straight stitching across the arm.