3421. Exponential equations Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
3422. Exponential equations Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
3423. Man operating a jig borer at Consolidated Aircraft, San Diego, CA Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Location: San Diego, CA Date: undated Format: Image Agent: unknown
3424. View inside a machine shop of two telemotors with steering gear wheels (rams) to be installed on ships. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3425. Steering gear wheel (ram) and telemotor installed on ship Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3426. Electro-hydraulic steering gear engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3427. Photograph of man with cigar in mouth and gesturing with his hand, is leaning over a railing. Likely J.L. Comiskey, president of the Chicago White Sox. Collection: Early 20th Century Engineering Lantern Slides Location: Date: undated Format: Image Agent: unknown
3428. Recommendation form listing traits of potential employee Collection: Early 20th Century Engineering Lantern Slides Set: Merit Rating Date: undated Format: Image Agent: unknown
3429. Man measuring a man's foot during Edward II's reign of 1324. Collection: Early 20th Century Engineering Lantern Slides Date: 1324 Format: Image Agent: unknown
3430. Organization chart, industrial relations division, Procter and Gamble Company Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
3431. Man in ancient times measuring on a table the breadth of his finger. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
3432. Organization chart of personnel activities, Goodyear Tire and Rubber Company Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
