Pair of Antique C.H. Stoelting Voice Keys

Antique pre-1930 voice keys for measuring auditory reaction time experiments. antique medical, antique psychology, antique science antique medical, antique psychology, antique science

L.E. Knott Apparatus Co. Wood and brass relay & L.E. Knott Apparatus Co. Resistance Box. Also includes C.H. Stoelting Apparatus Telegraph Key. Measures 3 1/4" x 8" x 4 1/8" & 4" x 8 1/4" x 4 1/2" & 4"

Antique pre 1903 C.H. Stoelting Hering's Contrast Apparatus visual contrast device with red/blue/green glass and stimulus plates. The Antique Hering's Contrast Apparatus by C.H. Stoelting is a vintage

Antique chronometer appears to by C.H. Stoelting pre 1930 with tambour needle, 2 gauges in 10 increments with case. Named after the French physiologist Charles Jacquet, this device allows researchers

Antique early lie Kymograph by C.H. Stoelting circa 1910. Rotates so stylus can make recordings on smoked paper. Used to record muscular motion, changes in blood pressure, and other physiological phen

This Pair of Antique Iron Jail Key- circa 1800’s are in very good condition. They are fairly large-measuring around 6 inches in length-keys- they are solid barrel. Show original wear, bends and

This Pair of Antique Iron Jail Key- circa 1800’s are in very good condition. They are fairly large-measuring around 6 inches in length-keys- they are solid barrel. Show original wear, bends and

Named after the renowned psychologist Carl Seashore, this apparatus allows for precise measurement and evaluation of auditory thresholds and hearing sensitivity. It typically consists of adjustable co

Pair of antique ornate door lock or cabinet keys. ~ Appear to be cast and finished by hand. Painted Gold

Pair Antique Brushed Steel Handcuffs w Inscription and Key, Made in U.S. A. Measure 9 inches x 3 inches.

Group of vintage misc. rods, clamps and cast iron stands by C.H. Stoelting & Chicago Apparatus Co. circa 1930. 20 pcs. with some labels. Measures 3" to 8" each. antique medical, antique psychology, an

1890's Wundt Control Sound Hammer, produces response for reaction time; brass era by C.H. Stoelting. The Wundt Control Sound hammer is a specialized tool developed by Wilhelm Wundt, a pioneering psych

Antique electromagnetic parts pieces and apparatus. Includes: Inductorium pre 1903, Chicago Apparatus Co. Reymond Type Inductorium that regulate current, C.H. Stoelting Transformer with 2 coils mounte

Includes C.H. Stoelting cardboard and metal disks in various diameters. Threlkeld & Tilford Scientific Apparatus & Specialty disks 1914. Universal Microphone Co. Stroboscope. Central Scientific Siren

4 fold out eye test charts pre 1930 and other various optical test materials on card stock by C.H. Stoelting. The Snellen Test Letters, named after the Dutch ophthalmologist Herman Snellen, are a stan

Antique early lie detection parts and accessories including: Pneumograph Sumner's intact hoses with metal end plates by C.H. Stoelting, 1930's. 51 wooden mouthpieces for spirometer by C.H. Stoelting,

Vintage black metal color mixer with label by C.H. Stoelting and over 400 rotator disks by various makers, sizes and colors mainly Hering's. vintage medical, vintage psychology, vintage science

Vintage C.H. Stoelting Goddard Form Board Test Form L, IQ kit wooden case with 10 wood puzzle pieces and figures. Measures 15" x 10" x 2. vintage medical, vintage psychology, vintage science

2 Vintage color mixers in powdered light blue with silver tone metal disks. Measure 12 1/4" x 8 1/8" x 8 3/4" vintage medical, vintage psychology, vintage science

Includes vintage memory measuring tools from circa 1930. Dearborn Langfeld type Tachistoscope by C.H Stoelting memory apparatus Finger Maze (Miles) C.H. Stoelting copper wire stapled to plywood base f

2 Vintage color mixers in powdered light blue with silver tone metal disks. Measure 12 1/4" x 8 1/8" x 8 3/4" vintage medical, vintage psychology, vintage science

Lot of three vintage memory drums by various companies mentioned in title. Includes paper rolls and some envelopes with vintage results from various patients. C.H. Stoelting, 1963 measures 6 1/2" x 9

Lot of mental measuring tools. Chicago Apparatus circa 1903 Calipers, C.H. Stoelting Tapping board, and Columbus Calipers circa 1930. Also includes two metronomes, one LaSalle Extension University Chi

Antique vintage group of various statistical and computation devices and tools. Includes: Weiss Slide Rule in carboard printed wheel by C.H. Stoelting circa 1950 Correlation and Machine Calculation bo