85. Test for applicant using hand and foot controls. They use both hands to adjust pegs and foot to rotate the horizontal bar. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
86. Test for applicant where they are positioning knobs with both hands simultaneously. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
87. Visual perception test for applicant to identify dots that are off center in circles on a page. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
88. Rhythm test for applicant dropping a ball into a rotating turntable. Collection: Early 20th Century Engineering Lantern Slides Set: Aptitude Tests Date: undated Format: Image Agent: unknown
89. Hele-shaw variable stroke pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
90. Electro-hydraulic motor in reduction gear casing Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
91. Electro-hydraulic pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
92. Electro-hydraulic pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
93. 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
94. Electro-hydraulic pump engine Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
95. Arrangement of studs in tubes Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
96. 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
