1. Cincinnati cylindrical grinding machine Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Location: Cincinnati, Ohio Date: undated Format: Image Agent: unknown
2. Typical single spindle Gardner grinder, no. 7 1/2 Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Location: Beloit, Wisconsin Date: undated Format: Image Agent: unknown
3. 14-inch vertical surface grinder with rectangular magnetic chunk of metal, by Pratt and Whitney Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Location: Hartford, Connecticut Date: undated Format: Image Agent: unknown
