[837]. Double riveted lap joint.
[838]. Single riveted butt joint.
[839]. Double butt joint.
[840]. T-iron butt joint.
[841], [842], [843], & [844]. Angle or edge seams.
[845]. Transverse tubular seam.
[846], [847], & [848]. Reducing ring seams.
[849], [850], [851], & [852]. Bottom seams round water spaces, fire-boxes, &c.
[853]. Expansion hoop joint in boiler flues, &c.