Showing 853 items
matching tube
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Geoffrey Kaye Museum of Anaesthetic History
Mask, Spectacle frame, c. 1930
The use of a catheter for oxygen therapy was introduced by Arbuthnot Lane in 1907. However, its true value can be seen in its use during WWI. Masks were cumbersome and uncomfortable for the wounded and nasal delivery of oxygen was received more easily. The Tudor Edwards' Spectacle-frame was manufactured in London during the 1930s. Dr Penn recorded that it was an inefficient means of oxygen therapy because of the smallness of the nasal tubes.Metal mask resembling spectacles with round frames and rounded ends of the arms to secure around the ear. There is a tube coming from each round eye frame to end in a curve that sits in the nostril. The other end of this tube has a rubber tube attached which meets in the middle via a metal connector.oxygen therapy, intra-nasal -
National Communication Museum
Souvenir - Souvenir cable, 1960
Construction on the Sydney Melbourne coaxial cable began in 1960 and was one of Australia's biggest and most important telecommunications projects of the 20th century. The laying of a coaxial cable between Sydney, Canberra and Melbourne, allowed people to direct dial long distance phone calls (rather than operator assisted), and supported simultaneous television broadcasts for the first time. It was officially opened on 9 April 1962 by the then Prime Minister, Sir Robert Menzies. This souvenir coaxial cable was presented to Mr Roy Kerr on his retirement. Mr Kerr was the Assistant Chief Engineer, Headquarters Customer Networks Branch, Telecom Australia.This cable has strong historic significance as part of the historic and technologically important Sydney-Melbourne coaxial cable. The cable represents not only a feat of technology but a shift in social engagement with telecommunication technologies, as it allowed people to direct dial long distance phone calls (rather than operator assisted), and supported simultaneous television broadcasts for the first time; it put the power of connection directly into the hands of the Australian public. This souvenir length of cable is well provenanced, and the details of the cables use and significance is inscribed on the steel casing. A 6 tube copper coaxial cable with lead sheath, quad 20lbs conductor cable (paper insulated), and a presentation metal collar and base. Inscriptions around the top of the metal collar and the base. "OLYMPIC CABLES PTY. LTD / AUSTRALIA" "6 TUBE COAXIAL CABLE / WITH 32 PAIRS 20LBS/MILE UNARMOURED / SYDNEY MELBOURNE 1960"coaxial cable, cable, sydney-melbourne coaxial cable, telstra, postmaster general's department (pmg), telecommunications, subscriber trunk dialling (std), television, telephone -
Hume City Civic Collection
Container - Lipstick tube, Paul Duval - Lipstick
The small tubes were used to hold lipstick which could be carried in the handbag or small evening bag.A small grey and silver lipstick container. The grey cover slips over the silver base. There is a small lever at the side of the base which released the lipstick up the tube.PAUL / DUVALcosmetics, make-up, paul duval, duval, paul, personal effects, george evans collection -
Parks Victoria - Wilsons Promontory Lightstation
Container, Ventometer
The cylindrical cardboard container with lid formerly contained a ventometer, a small simple tool for measuring wind speed. It consisted of a clear tube containing a small diaphragm which had a hole in the bottom for wind to enter. Once the wind entered the tube it pushed up the diaphragm, indicating the rate of velocity. Ventometers were common devices that have since been replaced by more sophisticated measuring equipment, such as digital air speed meters. Further information on this particular example, including perhaps the name of the manufacturer, may survive on the container but this has not been recorded. The small simple tool for measuring wind speed pre-dates the electronic devices at Gabo Island.Tubed shaped cardboard container with lid to house instrument for measuring. (instrument is missing) Inscriptions and illustrations on exterior. -
Victorian Interpretive Projects Inc.
Medicine, The Blue Light Ointment, c1917
Photograph of a box containing two tubes. It was given to Australian soldiers during World War One to prevent venereal disease.Inside box: Directions for Use Before Connection 1. Rub head and shaft of Penis with half the tube of No. 2 Ointment, White. 2. Always wear a sheath After Connection 1. Pass water IMMEDIATELY 2. Wash thoroughly Penis and Scrotum with soap and water. 3. Inject the whole of the contents of the Tube of No. 1. Oitnment, Brown, into pipe and massage back 2 inches. 4. Rub remainder of tube No. 2 Ointment, White, on head and shaft of Penis and Scrotum 5. Hold urine some hours after treatment 6. Report at V.D. Prevention Depot (Blue Light Depot) as soon as possible. 7. Having read directions and understood them, destroy by tearing up or by burning.world war one, medicine, ointment, venereal disease, vd, world war 1, world war, mmm -
Frankston RSL Sub Branch
Cigarette Case, (estimated); possibly WW2 trench art
Cigarette case probably made from oval shaped Aluminium tube (or similar aircraft construction material). The case has a removable lid which slides over an inner tube (see 'photos). The oval shaped ends of the case are made from a perspex (?) material or similar. The perspex piece fitted into the lid has four Japanese (?) characters marked in red. This item is possibly trench art manufactured from aircraft parts.There are four Japanese (?) characters written on lid however not yet translated.aluminium, case, container, trench art, cigarette case, tubing, tube -
Tatura Irrigation & Wartime Camps Museum
Memorabilia - Dagger, WW2
Made by the brother of Bruno Weinmann. The camp children collected toothpaste tubes, melted them down and poured into moulds carved out of wood, sand and clay.Small zinc dagger made from a melted toothpaste tube and cast into a mold. Housed in a 4 cm square plastic container with lid and sitting on yellow foam.bruno weinmann, dagger, toothpaste tubes -
The Beechworth Burke Museum
Postcard, 30/07/1942
The postcard image depicts the torpedo tubes with caps in position of a Japanese midget submarine that was involed in the attack on Sydney Harbour on May 31st, 1942. On the 31st of May 1942, in the midst of World War Two, Sydney found itself under attack from three Japanese midget submarines that entered Sydney Harbour under the cover of night. The first submarine became trapped in anti-torpedo nets and the third submarine was sunk in Taylor Bay. The second submarine fired on the heavy cruiser the USS Chicago. One of the torpedoes exploded near the depot ship the HMAS Kuttabul, killing 21 sailors.Black and white rectangular postcard printed on cardReverse: 7525-1/ POST CARD/ 2/ This postcard is a/ souvenir of the Exhibition/ of Japanese Midget Sub-/ marines sunk in Sydney Har-/ bour on the night of Sunday,/ May 31st, 1942, the night/ that the first attack on/ Sydney by a foreign power/ took place and was/ frustrated./ caps of the/ torpeto tubes/ 30th JULY 1942/ SERIAL No. 2/ Torpedo tubes of Japanese midget submarine with/ caps in position/military album, beechworth, burke museum, ww2, world war two, wwii, maritime, sydney harbour, sydney, japanese, japan, submarine, torpedo -
Kyneton Museum
Ammoniaphone, Dr. Carter Moffatt, Medical Battery Co, Voice Ammoniaphone and Box, Circa 1871-1900
The "Ammoniaphone" was developed by Dr. Carter Moffat in 1870 as an instrument to replicate the fresh Italian air and its qualities that seemed to assist with Italian vocalists. The Ammoniaphone was filled at both ends with a mixture of ammonia, hydrogen peroxide and peppermint oil, and the user inhaled the chemicals from the small tube in the centre. According to Dr. Moffatt, the Ammoniaphone was benefical to public speakers, Parliamentarians, vocalists, as well as assisting with bronchitis and consumption.Important to the collection due to its rarity and historical significance, as well as medical research capability.A long metal tube into which ammonia, hydrogen peroxide and peppermint oil were placed. The user inhaled the chemicals through the small tube in the centre of the object. It was thought to improve the voice through the inhalation of "artificial Italian air". Comes with the original box and instruction booklet."Medical Battery Co. 52 Oxford Street, London W"medical, quackery, voice alteration, consumption, ammoniaphone -
Royal Australian and New Zealand College of Obstetricians & Gynaecologists (RANZCOG)
Test tube and case associated with midwife Mary Howlett, c. 1866 - 1920
This type of test tube would have been used to collect blood or other bodily fluids. IT may also have been used to boil urine to identify the presence of urinary abnormalities such as sugar albumen acetone or bile.Mary Howlett (1840-1922) began practising as a country midwife in 1866 in the western district of Victoria. She qualified as a 'ladies monthly nurse' in 1887 and continued to practise as a nurse and midwife until 1920.She began her six months training at the Melbourne Lying-In Hospital. She was known by many as 'Auntie', and her career spanned more than 50 years. Mrs Howlett's midwifery box and contents were given to Dr Frank Forster, and he donated them to the museum collection in 1993.Glass test tube with a thin glass lip in original cylinder cardboard case. Case is in two section, lid and body - lid is lined with white cardboard.diagnostic testing, midwifery -
Geoffrey Kaye Museum of Anaesthetic History
Magill's laryngoscope, A Charles Kind, Ltd
This object is Magill's adaptation of the battery handle in the form of an "inserting tracheoscope". Introduced in 1935 for one-lung anaesthesia, it is combined with an endotracheal tube, the central part of which is a latex-covered wire spiral, and a bronchus blocker. In use, the tube was fixed to the holder and the whole apparatus inserted as a ttracheoscope. At the carina, the blocker was inserted into the bronchus and the balloon (now perished in this example) inflated. The holder was then removed leaving the endotracheal tube and blocker in place. The bronchus blocker consists of gum elastic on woven silver wire and has a suction channel opening at the tip. in other stages of development of Magill's laryngoscope, the original pattern blade was adapted to the battery handle, at first in a fixed arrangement and then with interchangeable blades of different sizes. Later still, the folding handle was introduced.This U-shaped chrome plated laryngoscope comprises an endotracheal tube used to facilitate access to the patient's airway, wire spring attachments and a cylindrical handle with provisions for battery to illuminate inside the body during use.Embossed on the central shaft of the item is 'A Charles King, Ltd', the maker's details.laryngoscope, anaesthesia, macgills, chrome, battery, a charles kind ltd -
J. Ward Museum Complex
Functional object - Hewitt's Airway, Unknown
Hewitt’s airway was the first known oral airway and laid the foundations for the numerous other airways that were later developed. The development of the oropharyngeal airway is one of the lesser-acknowledged advances in anaesthesia. Oral airways made anaesthesia safer and significantly reduced the trauma associated with earlier attempts at managing the obstructed airway. The Hewitt Airway – the first known artificial oral ‘air-way’. In 1890, Frederic Hewitt noted the frequency and danger of upper airway obstruction. In 1908, dissatisfied with the use of tongue forceps and that Esmarch’s maneuver sometimes failed, he described the first oropharyngeal airway, the Hewitt Airway. The tube was less than 8 cm long, ideally connecting the oral opening to the hypopharynx. The Hewitt Airway was the foundation for many subsequent oropharyngeal airway designs.The oropharyngeal airway is significant because of its lesser acknowledged advances in anaesthesia.Round metal tube with a brown rubber tubing sleeve around the outside.medical health, anaesthesia -
Robin Boyd Foundation
Slide, Robin Boyd, 1969
Robin Boyd was appointed Exhibits Architect for the Australian Pavilion at Expo ‘70 in Osaka and travelled to Osaka several times in 1969-1970. Boyd designed the innovative Space Tube, which had over 25 exhibition boxes, projecting from it. Amongst the topics covered were Australian scientific innovation (including brain research, immunology, Antarctic research, Snowy Mountains Hydro-Electric Power Scheme, rainmaking, and the night sky), Australian sport, house interiors, car manufacturing, Australian music and art, and Japanese-Australian relations.Colour slide in a mount. Space Tube, Australian Pavilion, Expo '70, Osaka, Japan (Architect: Robin Boyd.)Made in Australia / 35 / DEC 69M8expo 70, osaka, robin boyd, slide -
Robin Boyd Foundation
Slide, Robin Boyd, 1970
Robin Boyd was appointed Exhibits Architect for the Australian Pavilion at Expo ‘70 in Osaka and travelled to Osaka several times in 1969-1970. Boyd designed the innovative Space Tube, which had over 25 exhibition boxes, projecting from it. Amongst the topics covered were Australian scientific innovation (including brain research, immunology, Antarctic research, Snowy Mountains Hydro-Electric Power Scheme, rainmaking, and the night sky), Australian sport, house interiors, car manufacturing, Australian music and art, and Japanese-Australian relations.Colour slide in a mount. Space Tube (foreground), Australian Pavilion, Expo '70, Osaka, Japan (Architect: Robin Boyd)Made in Australia / 4 / MAY 70M3expo 70, osaka, robin boyd, slide -
Flagstaff Hill Maritime Museum and Village
Instrument - Marine Telescope, 1870-1880
This telescope was amongst various items collected from a sea dive in Port Phillip Bay. The diver was the caretaker of the Port Lonsdale Lighthouse, who dived on various wrecks in the bay during the 1960's. After the caretaker's death, his son sold off many of the shipwreck artefacts. The telescope was purchased from the caretaker's son in the 1990's by a previous owner of the Marine Shop, Queenscliff, Victoria. John Browning was particularly well known for his scientific advances in the fields of spectroscopy, astronomy, and optometry. Between 1856 and 1872, Browning acquired provisional patents for designs of numerous scientific instruments. He was also the recipient of an award at the 1862 International Exhibition held in London. Also recognised for his temperature-compensated aneroid barometer. Browning's scientific instruments were used in physics, chemistry, and biology. The products he designed and manufactured included spectroscopes, telescopes, microscopes, barometers, photometers, cameras, ophthalmologist, and electrical equipment such as electric lamps. John Browning was born around 1831 in Kent, England. His father, William Spencer Browning, was a maker of nautical instruments. John Browning's great-grandfather was also an instrument maker as well as John’s brother Samuel Browning of the firms Spencer & Browning and Spencer, Browning & Rust, who also manufactured navigational instruments. The latter firm was in operation in London from 1784 to 1840 and was succeeded by the firm of Spencer, Browning & Co. John Browning initially intended to follow the medical profession and entered Guy's Hospital, a teaching hospital and a school of medicine. Despite having passed the required examinations, however, he abandoned his plans. Instead, he apprenticed with his father, William Spencer Browning. At the same time, in the late 1840s, he was a student attending the Royal College of Chemistry several days per week. By the early 1870s, practical optics had become John Browning's primary interest, and he listed his occupation as an optician on the census records from 1871 to 1901. He was well known among London's ophthalmic surgeons for his various ophthalmic instruments. He had a large part in reforming the art of crafting spectacles. Other achievements were as an author of the book, How to Use Our Eyes and How to Preserve them by the Aid of Spectacles. Published in 1883, the book included thirty-seven illustrations, including a diagram demonstrating the anatomy of the eye. In 1895, he was one of the founders of the "British Ophthalmology" the first professional organisation for optometry. He was not only its first president but also registered as its first member so many considered him to be the first professional optometrist. Other professional organisations he belonged too was as a member of “The Aeronautical Society of Great Britain”. In 1871 constructing the first wind tunnel located at Greenwich Marine Engineering Works. He was also a member of other scientific organisations, such as the “Microscopical Society of London”, the “Meteorological Society”, and the “Royal”. Then in 1908 the company of W. Watson & Son, opticians and camera makers, took over John Browning's company since 1901 John Browning had been semi-retired but in 1908 he fully retired and moved to Bournemouth in Hampshire. He died in Cheltenham, Gloucestershire in 1925.The telescope is significant for its association with one of the world’s leading scientific instrument makers and inventor of the 19th and early 20th century. It is believed the donation came off a wreck either in Port Philip Bay or between Point Lonsdale and the Nepean Heads making it a significant maritime historical artefact. Its provenance is good given it was taken off a wreck in this area by the Point Lonsdale lighthouse caretaker. Examples of John Browning's telescopes because of their scientific and historical importance are highly valued by collectors.Marine style single draw brass telescope with a sunshade. The single draw has no split and the second cartridge is held in a long brass tube within the single draw, mounted from the objective end. The eyepiece is flat and at the end of the first draw in a very faded engraving that is believed to read "John Browning, 63 Strand, and should read London under the word strand but this is hard to establish given the engravings condition. This interpretation of the engraving has been arrived at by examination of other John Browning telescope engraving examples."John Browning, engraved to the first tube in copper plate style "63 STRAND" Engraved under in capital textflagstaff hill, flagstaff hill maritime museum and village, warrnambool, maritime museum, maritime village, great ocean road, shipwreck coast, shipwreck artefact, port phillip bay, port lonsdale lighthouse, wreck, 1960’s diver, queenscliff marine shop, john browning, telescope, spectroscopy, optometry, scientific instruments, william spencer browning, optician, navigational instrument, microscopical society of london, aeronautical society, marine technology -
Flagstaff Hill Maritime Museum and Village
Functional object - Telescope, 1752-1900
The discovery of the first telescope in 1608 can be attributed to Hans Lippershey of the Netherlands when he discovers that holding two lenses up some distance apart bring objects closer. He applies for a patent on his invention and this becomes the first documented creation of a telescope. Then in 1668, Newton produces the first successful reflecting telescope using a two-inch diameter concave spherical mirror. This opened the door to magnifying objects millions of times far beyond what could ever be obtained with a lens. It wasn’t until 1729 that Chester Moor Hall develops an achromatic lens (two pieces of glass with different indices of light refraction combined produce a lens that can focus colours to almost an exact point resulting in much sharper images but still with some distortion around the edges of the image. Then in 1729 Scottish instrument maker James Short invents the first parabolic and elliptic, distortion-less mirror ideal for reflecting telescopes. We now come to John Dollond who improves upon the achromatic objective lens by placing a concave flint glass lens between two convex crown glass lenses. This had the effect of improving the image considerably. Makers Information: John Dollond (1707-1761) London England he was a maker of optical and astronomical instruments who developed an achromatic (non-colour distorting) refracting telescope and practical heliometer. A telescope that used a divided lens to measure the Sun’s diameter and the angles between celestial bodies. The son of a Huguenot refugees Dollond learned the family trade of silk weaving. He became proficient in optics and astronomy and in 1752 his eldest son, Peter joined his father in an optical business, in 1753 he introduced the heliometer. In the same year, he also took out a patent on his new lenses. He was elected a fellow of the Royal Society in May 1761 but died suddenly in November and his share in the patent passed to his son Peter. In subsequent squabbles between Peter and the many London opticians who challenged his patent, Peter’s consistent position was that, whatever precedents there may have been to his achromatic lenses, his father had independently reached his practical technique on the basis of his theoretical command of Newtonian optics. As a result of maintaining his fathers patent, Dollond s became the leading manufacturer of optical instruments. For a time in the eighteenth and nineteenth century the word 'Dollond' was almost a generic term for telescope rather like 'Hoover; is to vacuum cleaner. Genuine Dollond telescopes were considered to be amongst the best. Peter Dollond (1731-1820) was the business brain behind the company which he founded in Vine Street, Spitalfields in 1750 and in 1752 moved the business to the Strand London. The Dollonds seem to have made both types of telescopes (reflecting and refracting), possessing the technology to produce significant numbers of lenses free of chromatic aberration for refracting telescopes. A Dollond telescope sailed with Captain Cook in 1769 on his voyage to observe the Transit of Venus. Thomas Jefferson and Admiral Lord Nelson were also customers of the Dollonds. Dollond & Co merged with Aitchison & Co in 1927 to form Dollond & Aitchison, the well-known high street chain of opticians, now fully part of Boots Opticians. They no longer manufacture but are exclusively a retail operation. John Dollond's experiments in optics and how different combinations of lenses refract light and colour gave a better understanding of the divergent properties of lenses. That went on to inform and pave the way for the improvement of our understanding of optics that are represented today. Dollond was referred to in his time as the "Father of practical optics" as a leader in his field he received many prestigious awards. The telescope in the collection is a good example of one of Dollonds early library telescopes and its connection with one of England's 18th-century pioneers in optical development is in itself a significant and an important item to have within the collection. One tube ships day & Night Telescope brass inner tube with timber main tube covered in leather. Unavailable to inspect Inscriptions to determine authenticity.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, telescope, dolland, shipwreck-coast, flagstaff-hill-maritime-village, royal national life boat institution -
Geoffrey Kaye Museum of Anaesthetic History
Beaker (Tumbler), 1977
This beaker (tumbler) was presented to the Faculty in 1977 by Professor Arthur Bull, as a token of esteem and friendship, from the Faculty of Anaesthetists College of Medicine of South Africa. It was in this year that Professor Bull was also awarded an honorary fellowship from ANZCA. Professor Arthur Barclay Bull was a pioneer of South African Anaesthesia, having played a major role in the specialty and research in anaesthesia from 1954. One of his achievements include the use of prolonged curarisation and IPPV for treating tetanus. In 1965 - 1967 the Taurus Blood Warmer was developed - named after Professor Bull - to prevent hypothermia after major blood transfusion. Not only was Professor Bull the presenter of this beaker, but also its maker. It is hand wrought from sterling silver recovered from discarded tracheostomy tubes. The maker has hallmarked the beaker with the initials A B. Hand wrought sterling silver beaker made from the silver recovered from discarded tracheostomy tubes.To / The Faculty of Anaesthetists / R.A.C.S. / from / The Faculty of Anaesthetists / C.M. of S.A. / 1977 [hallmark in maker's logo] A Btracheostomy, taurus blood warmer, the college of medicine of south africa, faracs -
Wonthaggi RSL
Trench shovel
A trenching tool used in Vietnam war, carried by soldiers with their kit. This tool had multiple uses including digging in-field trenches, disposal of human waste, and an an improptu weapon in hand-to-hand combat.This trenching tool is representative of filed kits issued to Australian soldiers in the Vietnam War. Length of handle suggests it was used by Sappers or Artillary.A portable folding shovel with a rivetted lip attached to a wooden handle. A metal tube is atached to the end of the handle. The metal blade is hinged by rivet to the metal tube on the end of the handle. A circular steel tube is on the metal tube.trenching tool, field shovel, vietnam war, military kit, shovel -
Warrnambool and District Historical Society Inc.
Paint set, Artist's paints, Late 19th century
These items are a collection of paints etc for those artists wanting to produce lustroleum and crystoleum works of art in the late 19th century and early 20th century. These works of art using lustroleum and crystoleum which were mainly metallic paints, were produced on a variety of surfaces, including glass, wood, tapestry, china and ivory. These items have no known provenance but it is known that lustroleum and crystoleum painting were popular pastimes with women in Warrnambool in the late 19th century. There are several records of women advertising classes in lustroleum and crystoleum painting in the 1880s and 90s in Warrnambool. One was these was Annie Newcombe, an art teacher who offered classes at her studio in Timor Street in 1884.This is a metal tin with a metal catch and a hinged lid. The tin contains 10 items - four glass bottles of Lustroleum, one glass bottle of gold paint, one glass bottle of purple metallic paint, one tube of green paint, one china bowl with a lip for pouring, one dish to hold paint with a broken base and one small dish for holding paint. There is also a sheet of paper containing information on the Crystoleum Company of London advertising that they supplied photographs, price list for classes, silk frames and crystal glasses. On bottles: ‘Lustroleum Registered’ ; ‘H. Bessemer, Gold Paint’, ‘Purple’, On tube: ‘Winsor & Newton, Chrome Green, Vert Anglais, London England’ crystoleum and lustroleum painting, warrnambool, paint set, artist's paints -
Flagstaff Hill Maritime Museum and Village
Stand and tubes
Stand wooden with test tubes cream painted. Holes for 12 tubes and storage pegs for 7. Supplied with 13 glass tubes of various sizes.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village -
Federation University Historical Collection
Scientific Instrument, Electron Discharge Tubes
Two variable vacuum discharge tubes (cathode ray tubes?). Two glass tubes, each with foil leaf electrodes inserted at opposite ends. scientific instruments, physics, electron discharge tube -
Geoffrey Kaye Museum of Anaesthetic History
Airway, Pharyngeal, Brown's, 1920
Metal tube with a flat plate across the top with two additional metal tubes coming out of it and curved toward the right. The main tube is covered in rubber.airway, insufflation, gilbert brown, pharyngeal -
University of Melbourne, School of Chemistry
Discharge Tubes
discharge tubes -
University of Melbourne, School of Chemistry
Fod
Gas Tubes -
University of Melbourne, School of Chemistry
Saverstoff
Gas Tubes -
University of Melbourne, School of Chemistry
Brom
Gas Tubes -
University of Melbourne, School of Chemistry
Scheufel Kohlenstoff
Gas Tubes -
University of Melbourne, School of Chemistry
Stickstoff
Gas Tubes -
University of Melbourne, School of Chemistry
Marsh Gras
Gas Tubes -
University of Melbourne, School of Chemistry
Chlor Wasserstoff
Gas Tubes