1. 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
2. Richard Robert's back-geared lathe Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
3. Single spindle machine with motor drive Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
