25. 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
26. 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
