3277. Drawings of the faces of Michelangelo and Alexander von Humboldt and a 3rd person. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
3278. Drawings of three faces side profile. Labelled convex, plane, and concave. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
3279. Drawings of two men, labelled angle-line and dot-line, with a graph mapping to personality traits. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
3280. Drawings of multiple faces labeled convex to concave, mapped to personality traits. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
3281. Drawing of man illustrating "will regions" Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
3282. Drawings of two faces with labels on chin and jaw. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
3283. Typical losses in an oil-fired marine boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3284. Refractory furnace linings compared between the navy and merchant installations Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3285. Comparison of 2 stud tube division walls - single vs double uptake divided furnace boilers Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3286. Water wall - sheet box side of a boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3287. Yarrow boiler with superheater, section of Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3288. Department heads and functions to be performed Collection: Early 20th Century Engineering Lantern Slides Set: Line & Staff Location: unknown Date: undated Format: Image Agent: unknown
