Reuben Henry Warn

• The Sheet Metal Worker's Instructor
• The sheet metal worker's instructor: containing a selection of geometrical problems, also ...
• The sheet metal worker's instructor, for zinc, sheet iron, copper, and tin plate workers, and others
• The sheet-metal worker's instructor, comprising a selection of geometrical problems and practical rules for describing the various patterns required by zinc, sheet-iron, copper, and tin-plate workers