Printed material & other papers documenting Halstead's research on the process of aging, brain function, & the problems of blind children; his activities in professional organizations; correspondence, term papers & exams of his students at...
Polygraph kit in wooden box. An apparatus designed to measure and record several physiological indiceses, (i.e. heart-rate, breathing, muscular contraction), usually while the subject answers a series of questions.
Memory Apparatus discs; discs used on Memory Apparatus bearing the nonsense syllables or other visual material, each item of which in turn is brought into temporary register with an exposure slot before which the memorizer sits.
Balopticon - Projection Apparatus; an optical instrument which projects an image from a transparency or an opaque image onto a projection screen or other surface, using an intense light and one or more lenses to focus the image.