2438 - 2786 MEDICINE (incl. Anatomical models and Medical instruments)
- Sl. dustsoiled; electrodes w. sm. signs of wear; 10 electrodes loosely in case. Briefcase sl. dam.
= Briefcase with an extensive inventory of different electrodes. The Violet Ray electrotherapy device was popular for the treatment of minor muscle discomfort and believed to provide healthy stimulation to ease anxiety, rheumatism, and inflammatory conditions.
= Very well preserved machine. The Violet Ray electrotherapy device was popular for the treatment of minor muscle discomfort and believed to provide healthy stimulation to ease anxiety, rheumatism, and inflammatory conditions. This device was probably used by "Nederlandsch Instituut voor Hoogfrequentie".
- Inside box sl. dustsoiled; 2 vague stamps on inside upper lid.
= Set comprises i.a. a "manometre centimètres d'eau", 4 test tubes/ reservoirs and 2 needles(?). Instrument in very good condition. This manometer was used to measure the pressure of the cerebral spinal fluid.
- Some w. sm. scratches, dents, (rust)stains and dam. handles; one repaired; others in very good condition.
= Eleven normal clyster syringes and two syringes with nozzle for self-administration to avoid the need for a second party to attend an embarrassing procedure. SEE ILLUSTRATION PLATE CI.
- Sm. signs of wear; trifle dustsoiled. Case trifle soiled.
= The New Silver Anniversary Model "28" was produced on the occasion of the 25-year anniversary of the first Acousticon hearing aid made in 1902 for Queen Alexandra of the United Kingdom of Great Britain by Miller Reese Hutchison. In honour of this occasion, the microphone and volume control as well as the case were inlaid with a fancy pattern. This new model was described as "the smallest, lightest and finest of all hearing aids", but it still had the size of a large lunchbox. Hutchison, inventor and renowned for his invention of the car signal horn, started "Akouphone Company" in Alabama in 1899 together with James H. Wilson. In the same year they produced their first electrical hearing aid "Akou-lallion" (after the Greek word "akouó" for hearing and listening). Until 1980 Dictograph Products produced hundreds of different types of hearing aids, which made it the second biggest supplier in the world. In 1923 the Dutch V.E. Ketjen, J. Haspels and C.R. van der Hoogt started Acoustion in the Netherlands. (Beem. De historie van het hoortoestel, p.52ff.). SEE ILLUSTRATION PLATE CII.
- Mirror sl. dam., otherwise all instruments and case very fine.
= Set comprises 3 mouth mirrors, a lenghtening piece and a frame w. laryngeal mirror.
- Some w. sm. signs of wear, but mostly in very good condition.
= Broad collection of different ear trumpets representing the history of acoustic ear trumpets between 1800 and 1900. These acoustic ear trumpets are tubular or funnel-shaped devices which collect sound waves and lead them into the ear. They serve as hearing aids, resulting in a strengthening of the sound energy impact to the eardrum and thus a better hearing for a deaf or hard-of-hearing individual. By the late 18th century, their use was becoming increasingly common. Collapsible conical ear trumpets were made by instrument makers on for specific clients. Toward the late 19th century, hidden hearing aids became increasingly popular. Besides the big, visible ear trumpets, manufacturers began to make smaller devices like 'acoustic headbands', where the hearing aid device was artfully concealed within the hair or headgear. These were made in a variety of shapes that incorporated sound collectors near the ear that would amplify the acoustics. Hearing aids were also hidden in couches, clothing, and accessories. This drive toward ever increasing invisibility was often more about hiding the individual's disability from the public than about helping the individual cope with his problem. This collection comprises: 1. 3 "London Dome" ear trumpets (two brass/ metal, one tortoise celluloid). The name of this type of trumpet comes from its similarity in shape to the dome of St. Pauls Cathedral in London. The design is a parabolic reflector that directs the sound into the ear tube. This achieves considerable gain while maintaining a small size. 2. Three brass and two metal "Guye" ear trumpets, after the Dutch proffesor A.A.G. Guye. This telescopic horn is mostly made of metal and was also used during World War I to intercept the enemy over great distances. 3. Five conversation tubes (black/ tortoise celluloid) which are different from the other ear trumpets because unlike ear trumpets that could pick up sound from distance, conversation tubes were designed to pick up sounds directly from the speaker's mouth. Besides that, it was double effective because the speaker was forced to speak loudly because it was visible that the hearer was having badly hearing. Later conversation tubes were also hidden in chairs. 4. Four ear trumpets after Siebenmann (one brass, two black celluloid and one tortoise celluloid) and two metal andone copper straight telescopic horns. 5. Five auricals, all tortoise celluloid. Liebermann trumpets are impressive in their ability to improve speech understanding in noise due to the boost in high frequencies through the resonance of the narrow tube leading to the ear. Besides that, people had their hands free while listing. Surprisingly enough, acoustic hearing aids did not die out completely with the invention of more modern hearing aid technologies. In fact, they were manufactured right up to around 1990. SEE ILLUSTRATION PLATE CII.
- One instrument w. a few ruststains. One handle broken off. Complete set, very fine.
= Edelmann & Sohn (1863) started as a company specialised in electrical machines and made products for electrical engineering. Max Th. Edelmann became interested in medical applications and doctor Friedrich Bezold inspired him through his discovery that deaf people still have some hearing. To proof that, Edelmann developed a very precise, adjustable medical tuning fork to measure and produce very high frequencies.
- Some w. sm. signs of wear, but mostly fine.
= Carbon, vacuum-tube and transistor hearing aids. After 1900 mechanical hearing aids such as ear trumpets disappeared because hidden hearing aids became increasingly popular. The first electronic hearing aids were constructed after the invention of the telephone and microphone in the 1870s and 1880s. The technology within the telephone increased technical possibilities for the altering of accoustic signals. The first electric hearing aid used a carbon transmitter, so that the hearing aid could be portable. The carbon transmitter was used to amplify sound by taking a weak signal and using electric current to make it stronger. One of the disadvantages of carbon hearing aids was that they had to be used upright, otherwise the carbon grains would roll away and would not produce a signal. From 1921 the vacuum tube hearing aid came on the market and used a telephone transmitter to turn speech into electrical signals. After the signal was converted, it would be amplified when it moved to the receiver. Military technological advances that occurred in World War II helped the development of hearing aids. One of the major advances was the idea of miniaturization, which led to the development of transmittor hearing aids because they were smaller than vacuum tubes, required less battery power and created less distortion and heat than their predecessor. This lot contains i.a. the carbon hearing aids "Deutsche Akustik Type CVII" (±1931), "Acoustion C4" (1937), "Ossicaide" (±1930) and "Ardente 1(?)" (±1937); the vacuum tube hearing aids "Blaupunkt Omniton" (1950), "Bonochord" (±1940), "Zenith Bone-Air A3A B3A" (1955) and "Beltone Harmony" (1947); and transmitter hearing aids from "Fortiphone" (±1960), "Acousticon GA 120" (±1955) and "Elm-Hörapparate" (±1955).
= Medical instruments in very good condition. Probably produced by Gowllands, London. Set comprises electrical otoscope with pneumatic and ophthalmoscope heads, 2 nasal specula, a handmirror, tongue depressor, spare lamp and a "Hagee Zoeklicht Batterij".
= In the early 20th century, Freud and his followers introduced a reinterpretation of the disorder "hysteria". In the traditional canon, hysteria and related disorders, were caused by sexual deprivation. When other cures failed, the recommended treatment was massage of the genitalia. Around the same time, a battery-powered vibrator was introduced to the consumer market and advertised and prescribed as a combination of hip slimmer, reducing cellulite, dandruff buster and cure for back problems. Some of the advertising overtly suggested sexual uses, and described the action of the vibrators as "thrilling" and "penetrating," promising that is was "very useful and satisfactory for home" as a result vibrators also became a sexual massage device.
- Instruments sl. oxidized, otherwise in good condition. Box w. a few dam. spots.
= Reflector otoscope after/ by Brunton (1883). Ferguson only made medical instruments until 1869. E. Bennion, Antique medical instruments, 1980, p.316.
Gowllands. (Otoscopic diagnostic set). Case w. set of 7 instruments, each piece stamped "Gowlland [sic], England", London, ±1940, in orig. fitted velvet-lined case w. printed manufacturer ticket "Gowllands. Made in Engeland" mounted on inside upper lid, 12,5x18x5 cm.
- Manufacturer ticket loosening; instruments and case in very good condition.
= Case comprises i.a. an opthalmoscope, nasal speculum with 2 extra parts and 2 spare lamps. SEE ILLUSTRATION PLATE CIII.
= Instruments in very good condition. Set comprises auriscope with pneumatic and ophtalmoscopic head with bulb, 3 nasal specula and 4 spare lamps.
- Very fine set. Lacks lining on inside upper lid; lining on inside lower lid w. a few dam. spots; case sl. worn along extremities. = Case comprise i.a. opthalmoscope, nasal speculum, tongue depresser, two mirrors and throat lamp.
- Vibrator w. sm. signs of wear. Box repaired w. tape along extremities.
= Complete set in very good condition comprises i.a. an electroscope with electric light source which was invented by urologist M.C.F. Nitze and instrument maker J. Leiter in 1877; "schlittenrohre zur Oesophagoskopie"; multiple "Verlängerbare Rohre" in diverse lengths; "Laryngealspatel"; "Kokainzerstäuber"; "Spiegelpumpe" and several surgical instruments.
- In very good condition.
= Comprises i.a. 5 objectives in a silk lined fitted case, 4 by E. Leitz Wetzlar (1x, 3x, 6x, 8x) and 1 by Oel Immersion (1,5x); 3 oculars (1x, 1,5x and 3x); glass microscope slides and cover slips, 4 preparation instruments (i.a. a scalpel and a tweezer) and 2 small glass bottles with "immersie-olie" and "zedernöl". SEE ILLUSTRATION PLATE CII.
- Despite slight signs of wear, a very fine set.
= Set comprises i.a. a light reflector with head band, 4 nasal specula (1 after Fraenkel), 6 dental mirrors and 2 tongue depressors. Complete and well preserved.
= Instrument in very good condition.
- Lacks approx. 10 instruments; all instruments w. (blood)stains and signs of wear. Key of lock missing.
= This large set comprise i.a. 2 tenon saws, folding bistouries, thin and curved amputation blades and knives and 5 tourniquettes with original cloth straps and pads (with bloodstains). Although missing instruments, case looks very complete.