25. Chart illustrating the relationship between mental age and occupation Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Agent: unknown
26. Diagram showing effect of boiler pressure upon boiler efficiency Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
27. Diagram showing effect of feed water boiler temperature upon boiler efficiency Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
28. How 34,700,000 jobs are divided Collection: Early 20th Century Engineering Lantern Slides Set: Personnel Location: United States (nation) Date: undated Format: Image Publisher: Business Week
29. American labor unions, who is organized and who is not Collection: Early 20th Century Engineering Lantern Slides Set: Personnel Location: United States (nation) Date: undated Format: Image Publisher: unknown
30. Time study showing time reading for various processes with a stud, with totals and averages at bottom. Collection: Early 20th Century Engineering Lantern Slides Set: Time and Motion study Date: undated Format: Image Publisher: unknown
31. Chart from a study by M. R. Trabue, comparing the abilities and personality traits of general clerical workers across different industries. Collection: Early 20th Century Engineering Lantern Slides Set: H. I. M. (Human Interaction Management) Date: undated Format: Image Publisher: unknown
32. Score report for Dorothy Robinson on speed (operating), inspection, and dual (both). Collection: Early 20th Century Engineering Lantern Slides Set: Merit Rating Date: 13906 Format: Image Publisher: unknown
33. Score report for Caroline Jones on speed (operating), inspection, and dual (both). Collection: Early 20th Century Engineering Lantern Slides Set: Merit Rating Date: 13903 Format: Image Publisher: unknown
34. Accident Toll in U.S. Collection: Persuasive Cartography: The PJ Mode Collection Format: Image Creator: Sundberg, Edwin L. Date: 1946 Posted Date: 2015-08-25
35. 1948 "The Meaning of Negro History" for Negro History Week, graphic folded insert for IWO Fraternal Outlook magazine by Herb Aptheker Collection: International Workers' Order (IWO) and Jewish People's Fraternal Order (JPFO) Set: Black Jewish Relations Black Labor, Organizing and Rights Visual Exhibit and Collection Highlights IWO and JPFO Affiliated Publications and Publishing Cold WarEducation Location: 80 Fifth Avenue, New York City, New York Date: 1948-02 Format: Image Creator: Aptheker, Herbert, 1915-2003 Recipient: Fraternal Outlook readers Organization: International Workers Order
