3481. Transmission of an automobile with two-speed gearset. Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
3482. Hele-shaw variable stroke pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3483. Electro-hydraulic motor in reduction gear casing Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3484. Electro-hydraulic pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3485. Electro-hydraulic pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3486. Anchor windlass used on ships to raise and lower the anchor. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3487. Electro-hydraulic pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3488. Arrangement of studs in tubes Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3489. Chart showing percent of applicants who will be successful. Collection: Early 20th Century Engineering Lantern Slides Set: Merit Rating Date: undated Format: Image Agent: unknown
3490. Ranks assigned to 10 anonymous applicants by 12 interviewers. Collection: Early 20th Century Engineering Lantern Slides Set: Merit Rating Date: undated Format: Image Agent: unknown
3491. The first photograph showing dozens of men taking tests. The 2nd photograph shows a supervisor timing an applicant in a jigsaw-puzzle test. Collection: Early 20th Century Engineering Lantern Slides Set: Merit Rating Date: undated Format: Image Agent: unknown
3492. 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
