screwed onto the spindles and then pinned, thus allowing the work to be fed through the wheels, backwards or forwards, with danger of the wheels coming off.

Grooving Machine. In using the machine shown in Fig. 80 the operator can observe his work during the whole process of grooving. Seams can be formed on the inside or outside of the cylinder and it may be used on all vessels not less than two inches in diameter. Four rolls are put up with each machine, one each with

groove, and one flattening roll. When the rack is thrown back to the standard the grooving roll is lifted from the lower bar and can be easily released for the purpose of changing the rolls. These groovers are adapted to metal not heavier than No. 22 gauge.

The same machine is shown in Fig. 81, with a groove flattening attachment-this attachment enables the workman to groove and flatten the seam at one operation.

The grooving roll is placed in front of the attachment, and the flattening or following roll in the place

occupied by the grooving roll. The grooving roll having passed along the lock and grooved it, the flattening roll follows and flattens it.

Stove Pipe Elbow Edger. The illustration in Fig. 82 shows the position of an elbow in turning the edge, also the form of crease made by the machine to enter the corresponding section in completing the elbow. And Fig. 83 shows the position of the pipe or elbow in forming the bead to receive the creased section, as shown in Fig. 82.

Power Wire Turning Machine. The machine shown in Fig. 84 is intended for use on very heavy work, and is suitable for brass kettles and other vessels made of sheet metal as heavy as No. 16 gauge. Wire as large as 3 inch in diameter may be used.

A turning machine is used in bending or curving the top of a vessel for the wire which is inserted to give it additional strength and finish.

A wiring machine is used to finish the operation by completely and compactly covering the wire.

The machine illustrated can be arranged to do a variety of work, such as wiring, turning, beading, etc.,

by making special rolls adapted to the work to be performed. The size of the pulley can be varied according to the work to be done. They are fitted with a pulley 12 inches in diameter, having a 3-inch face.

Combined Stove Pipe Crimper and Beader. These machines are designed to facilitate the making and. putting together of metal pipe of different diameters. They crimp and contract the edges of stove and conductor pipe, so that the lengths are put together easily. Some are provided with beading rolls, which bead