73. Electro-hydraulic steering gear engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
74. 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
75. Test for inspecting pencils and sorting them into box with dividers. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
76. Right-right turning test of picking up screws and screwing them into a board. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
77. Pinboard test for employees before they work in a pencil factory. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
78. Man standing in front of vertical milling machine used for profiling (finishing). Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
79. Wide view of factory with automated machines Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
80. Man's hand holding a caliper in from of a hobbing machine. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
81. Cast iron cylinder block manipulated by a machine, which is shown. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
82. Drill-making machine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
83. Man (machinist) operating a drilling machine. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
84. Test for applicant where they are using right hand and left hand simultaneously to turn pegs. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
