5 10 47 https://exhibitions.abdn.ac.uk/university-collections/files/original/72a1701a1c8b45958ae6ddeff0b19d1b.jpg 14aff488271f7884e5997cefc1340115 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Diving bell model. A glass bell with a brass fitting on top out of which a rubber tube projects. A length of string is tied to the fitting. Inside the bell is a rubber ring by the opening, suspended by wire from the top of the bell. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Diving bell model. A glass bell with a brass fitting on top out of which a rubber tube projects. A length of string is tied to the fitting. Inside the bell is a rubber ring by the opening, suspended by wire from the top of the bell. Identifier An unambiguous reference to the resource within a given context ABDNP:200063a Description An account of the resource "Halley’s Diving Bell The diving bell made its appearance in the 16th century, under the name campana urinatoria, and accounts can be found of its use in the 17th century to recover sunken treasure. One adventure raised gold, chains and other articles from an Armada wreck off Mull. The most successful design of the early bells was that of Dr Edmund Halley (1656-1742); our model was made to show some of the principles he used. The original Halley ‘bell’ was a slightly conical chamber of 60 cubic feet with a flat glass roof and lead- coated wooden walls. Two divers sat in ordinary clothes on the circular seat within. Enough lead weights were secured to the bottom so that the whole could be lowered to the seabed, with pauses every 12 feet to allow the divers to adapt to the increasing pressure. The water rose up inside the bell as it was lowered but additional air was added from separate lead-covered casks with feeder tubes, lowered outside the bell from the ship above. By this means almost all the water could be expelled from the bell, allowing the divers to operate in almost dry conditions. Warm stale air was expelled from an orifice at the bell top. A diver could communicate by sending up a message with the used casks, written by an iron point on a lead pad. Halley’s bell worked in typical depths of 20 to 60 feet. It was susceptible to being tipped over if its edges caught on an obstruction while it was being lowered, with disastrous consequences for the divers. Diving technology has fortunately developed considerably in the ensuing 300 years. Our model is believed to be the late eighteenth-century demonstration piece recorded in Professor Patrick Copland’s inventory as ‘Diving bell, small glass model £0-2-6’. In the demonstration, the tube at the top was used for adding compressed air when it was underwater, rather than removing stale air as in the original bell." Author: Reid,John.S Date: 1993 Purpose: University.Newsletter Date A point or period of time associated with an event in the lifecycle of the resource 1780-1800 Format The file format, physical medium, or dimensions of the resource glass, brass, rubber, string, iron wire height 178 mm, diameter 105 mm Type The nature or genre of the resource Physical Object Copland https://exhibitions.abdn.ac.uk/university-collections/files/original/04596d8ca4dce25681bae06733ecedc0.jpg 75c61d004862fa69e1dbffd929e3ce46 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Hadley's octant. An triangular ebony frame shaped like a section of a circle, with an ivory scale along the curved outer edge. A brass arm with a small scale and a screw at the end reaches from the point of the frame to the outer edge and can be rotated along it. There are three black glass discs in hinged brass frames on one side and the whole instrument stands flat on small brass legs. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Hadley's octant. An triangular ebony frame shaped like a section of a circle, with an ivory scale along the curved outer edge. A brass arm with a small scale and a screw at the end reaches from the point of the frame to the outer edge and can be rotated along it. There are three black glass discs in hinged brass frames on one side and the whole instrument stands flat on small brass legs. Identifier An unambiguous reference to the resource within a given context ABDNP:200044a Description An account of the resource Ebony frame with ivory scale having anchor engraved at its centre, calibrated in degrees, micrometer adjustment & Vernier to 1' arc. 1 green shade, 2 red shades. Double pin-hole site with moveable cover across a single pin-hole. Forerunner of the sextant, the OCTANT is similarly used as a navigational aid to measure angles from which the position of the observer can be deduced. The measurement most commonly taken is the altitude of the sun at noon. This particular octant is likely to be the one recorded as purchased in 1803 for £3.10.0 . Date A point or period of time associated with an event in the lifecycle of the resource 1803 Format The file format, physical medium, or dimensions of the resource wood, brass, ivory, glass radius 254 mm Type The nature or genre of the resource Physical Object Copland https://exhibitions.abdn.ac.uk/university-collections/files/original/62962dc5684a6ac4717de1446da5b42e.jpg bba4d8a5d9bbe168bb022f5a42e2ee42 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Dotchins. Small wooden boxes shaped like guitars with long necks, containing quills marked with scales from which metal dishes are suspended with string. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Dotchins. Small wooden boxes shaped like guitars with long necks, containing quills marked with scales from which metal dishes are suspended with string. Identifier An unambiguous reference to the resource within a given context ABDNP:200030a, 200030b, 200030c, 200030d Description An account of the resource 4 different sets of balances. Chinese balances in bamboo carrying cases known as Dotchins. They were used in the Chinese market place for weighing gold currency that consisted of irregular pieces stamped with their purity; violin-shaped wooden case with brass pan attached to string attached to ivory measuring pole. Chinese symbol on one side; sliding bamboo fastener Date A point or period of time associated with an event in the lifecycle of the resource 1780-1820 Type The nature or genre of the resource Physical Object Copland https://exhibitions.abdn.ac.uk/university-collections/files/original/d1193034201bf76d44e30508a3aa09c5.jpg 29cb7520bedb5973d09f6670e33d3823 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Graham's deadbeat escapement model. Brass model of an escapement consisting of a 60 second clock face behind which is a toothed wheel which is struck alternately by the ends of a curved brass arm connected to a spindle. The spindle would have a pendulum attached to it. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context ABDNP:200022a Description An account of the resource Brass and wooden model of escapement with 60 second face. Pendulum ( ABDNP200022b ) fits on rear. Holes on right of base probably for small pulley wheel, now missing. Dial marked in seconds and labelled every 10 seconds. Escapement wheel 152 mm external diameter. Replacement dial hand fitted in 1982. It's special feature is that the escapement wheel doesn't rebound at each tick but stops dead. Creator An entity primarily responsible for making the resource John King Date A point or period of time associated with an event in the lifecycle of the resource 1781-1789 Format The file format, physical medium, or dimensions of the resource Brass, wood height 267 mm; dial diameter 150 mm; base depth 183 mm; width 230 mm Type The nature or genre of the resource Physical Object Title A name given to the resource Graham's deadbeat escapement model. Brass model of an escapement consisting of a 60 second clock face behind which is a toothed wheel which is struck alternately by the ends of a curved brass arm connected to a spindle. The spindle would have a pendulum attached to it. Copland https://exhibitions.abdn.ac.uk/university-collections/files/original/10966bee2f433f5ae5ed8551ff9c52e8.jpg bffde02b92d759a7fdec8f292861d241 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Dr. Lorimer's dipping compass. An octagonal wooden box from out of which projects four intersecting brass rings perpendicular to each other and incised with degree scales. Suspended in the innermost ring, which is oriented upright, is a needle which can rotate freely inside the ring. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Dr. Lorimer's dipping compass. An octagonal wooden box from out of which projects four intersecting brass rings perpendicular to each other and incised with degree scales. Suspended in the innermost ring, which is oriented upright, is a needle which can rotate freely inside the ring. Identifier An unambiguous reference to the resource within a given context ABDNP:200013a Description An account of the resource Instrument for showing that a compass needle not only points to magnetic north but if freely suspended will point into the ground. This later phenomenon is known as the 'dip' of the compass needle. Horizontal scale 0 -90 in 1/20 on either side of N and S points. (Thus exceeding S 53.15 W). Vertical scale marked all round inside of inner circle in 1 degree intervals with 10 reading digits on scale of inner circle. Compass on double gimbals. Top section of octagonal box (with inscription plate) rotates about a central vertical axis defined by a brass bearing between box and base plate. Base plate has 3 small five-toed feet. 'Univ. Abdn. Nat. Phil.' embedded circular disk. Inscribed: 'Instrumentum hocce Navalem ad rem atque Philosophican percutile Ioan Lorimer M.D ingenio excogitatum. Academiae Marischallanae Abredonensi grato animo erga Almam Matrem Inventor ipse dono dedit A.D. 1795' Creator An entity primarily responsible for making the resource Dr. John Lorimer Date A point or period of time associated with an event in the lifecycle of the resource 1764 Format The file format, physical medium, or dimensions of the resource wood, brass, glass Type The nature or genre of the resource Physical Object Copland https://exhibitions.abdn.ac.uk/university-collections/files/original/eee94b57b45a93f5d7993ca32124f12e.jpg 9ee35934b60b146e76f36e268fc42023 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Achromatic telescope. Long brass telescope with smaller viewfinder telescope on a tall mahogany stand with three legs. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Achromatic telescope. Long brass telescope with smaller viewfinder telescope on a tall mahogany stand with three legs. Identifier An unambiguous reference to the resource within a given context ABDNP:200006a Subject The topic of the resource Patrick Copland, astronomy, science, history of science Description An account of the resource 'Dollond's achromatic telescope of two and three quarter inch aperture and 4 feet focus, with polar axis, on a mahogany stand, 2 astronomical and 1 terrestrial eyepiece and a divided object glass micrometer.' The instrument in the University's possession fits this description except that it has only one eyepiece. It is signed 'Dollond, London' but unnumbered. Mackay records (in 'The Theory and Practice of finding Longitude at Sea or Land' pg 199, first edition, London 1793) that for observations of Jupiter's satellites he used powers of 'about 80 and 115 according to the state of the atmosphere.' In the observatory notebook (A.U.L. Ms 504) he records powers of about 70 and 126 and always refers to the telescope as the '46 inch achromatic of Dollond.' Maskelyne suggested (in a letter to Patrick Copland, dated 7th Dec. 1780 in A.U.L. Ms 2886) that Sisson should make the mount but there is no record of whether he did or not. The cost was pounds £73.10. A similar telescope was purchased by the Radcliffe Observatory in 1774 and is illustrated as item 183 in R.T.Gunther 'Early Science in Oxford' vol.II opposite pg 314 (Oxford,1923). Dollond's divided object glass is shown in a photograph in the Van Marum collection catalogue (66) pg 298, fig 224 and also in R.T.Gunther ibid. opposite pg 329. On equatorial mount with remains of sighting telescope . Its focal length and aperture are correct, as in the mount type and material. With object glass micrometer (separate) and one steadying arm (separate). Creator An entity primarily responsible for making the resource Dollond and Co., London Date A point or period of time associated with an event in the lifecycle of the resource 1781-1783 Format The file format, physical medium, or dimensions of the resource Brass, wood, glass Type The nature or genre of the resource Physical Object Copland https://exhibitions.abdn.ac.uk/university-collections/files/original/c6d3f5f8b46d00fa90be5d0a05c7644a.jpg 461e9a1b60958b8f4f6f7f2967f21224 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Equatorial telescope. A brass telescope mounted on a set of large, ornate brass wheels with finely graduated scales on them. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Copland Teaching Apparatus Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Equatorial telescope. A brass telescope mounted on a set of large, ornate brass wheels with finely graduated scales on them. Identifier An unambiguous reference to the resource within a given context ABDNP:200001a Subject The topic of the resource Patrick Copland, astronomy, telescope, science, history of science Description An account of the resource Universal equatorial instrument. 18th century instrument for positional measurement of stars with telescope mounted on an equatorial mount having finely graduated scales. Brass with 18" circles. Originally made by Sisson. Afterwards divided anew, with an achromatic telescope and 'refraction apparatus' (to correct for atmospheric refraction) added by Ramsden. Optics missing. Badly cleaned sometime 1955-1965. Creator An entity primarily responsible for making the resource Jeremiah Sisson (1720-1783), modified by Jesse Ramsden (1735-1800) Date A point or period of time associated with an event in the lifecycle of the resource created 1760-1777, modified by Ramsden in 1782 Format The file format, physical medium, or dimensions of the resource Brass, glass. The large rings are 457.2 mm wide. Type The nature or genre of the resource Physical Object Copland