1. Shield (gun housing, barbette) for guns used on battleship. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
2. Row of houses for employees of Minnesota Steel Company, Duluth, Minnesota Collection: Early 20th Century Engineering Lantern Slides Set: Personnel Location: Duluth, Minnesota Date: undated Format: Image Agent: unknown
3. Row of houses for employees of Carnegie Steel Company, East Pittsburgh, Pennsylvania Collection: Early 20th Century Engineering Lantern Slides Set: Personnel Location: East Pittsburgh, Pennsylvania Date: undated Format: Image Agent: unknown
4. Graph showing use of various personnel management devices in 195 concerns in employment, maintenance, payment, and factors in wage determination. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
