<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dcterms="http://purl.org/dc/terms/">
<rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9809">
    <dcterms:title><![CDATA[Mercury vapour arc rectifier]]></dcterms:title>
    <dcterms:description><![CDATA[Provides approx. 1200 Volts at a few hundred Amps . One of the largest vacuum tubes. Pool of mercury in the base acts as a cathode, feeding the 3 side-arm anodes, one for each phase of a 3-phase supply. Three intermediate grids provide some control over the large current .]]></dcterms:description>
    <dcterms:creator><![CDATA[unknown]]></dcterms:creator>
    <dcterms:format><![CDATA[mercury]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:200137a]]></dcterms:identifier>
    <dcterms:coverage><![CDATA[unknown]]></dcterms:coverage>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9810">
    <dcterms:title><![CDATA[telescope]]></dcterms:title>
    <dcterms:description><![CDATA[Small brass telescope. Part of something.]]></dcterms:description>
    <dcterms:creator><![CDATA[Unknown]]></dcterms:creator>
    <dcterms:date><![CDATA[1850-1950]]></dcterms:date>
    <dcterms:format><![CDATA[length 195 mm, diam. 25 mm]]></dcterms:format>
    <dcterms:format><![CDATA[metal, glass]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:200701a]]></dcterms:identifier>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9811">
    <dcterms:title><![CDATA[discharge tube demonstration]]></dcterms:title>
    <dcterms:description><![CDATA[One of two tubes have a spiral glass feature; presumed to have been acquired as a set with five others]]></dcterms:description>
    <dcterms:date><![CDATA[1897-1910]]></dcterms:date>
    <dcterms:format><![CDATA[glass; wood; metal]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:200123d]]></dcterms:identifier>
    <dcterms:coverage><![CDATA[London (?)]]></dcterms:coverage>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9812">
    <dcterms:title><![CDATA[electromagnet]]></dcterms:title>
    <dcterms:description><![CDATA[a substantial soft iron core wound with 10 coils (5 on each leg) wired in series aiding and joined to a copper bus and two brass thumbnuts.  A horseshoe &#039;keeper&#039; is separate]]></dcterms:description>
    <dcterms:date><![CDATA[1830-1890]]></dcterms:date>
    <dcterms:format><![CDATA[370mm long (including the keeper, 150mm wide 100mm high]]></dcterms:format>
    <dcterms:format><![CDATA[soft iron, copper wire, brass]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:200499a]]></dcterms:identifier>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9813">
    <dcterms:title><![CDATA[Scaler 1800]]></dcterms:title>
    <dcterms:description><![CDATA[IDL Scaler 1800, 4 Push Button Switches: Start, Stop, Reset, Test; 5 Dekatrons; Type: 1800C, Serial No. 178, a range of inputs]]></dcterms:description>
    <dcterms:creator><![CDATA[IDL]]></dcterms:creator>
    <dcterms:date><![CDATA[1965-1975]]></dcterms:date>
    <dcterms:format><![CDATA[500 mm, 340 mm deep, 160 mm high]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:201948a]]></dcterms:identifier>
    <dcterms:coverage><![CDATA[Beenham, Reading, England]]></dcterms:coverage>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9814">
    <dcterms:title><![CDATA[Anamorphic drawings]]></dcterms:title>
    <dcterms:description><![CDATA[4 anamorphic drawings on circular sheets of waxy paper.  Small hole in centre of sheets:<br />
1)  Bird of paradise in blue, red and green.<br />
2) stork in black and white with red beak and legs and green frog in its mouth<br />
3) diagram of four overlapping playing cards around 360 degrees. King of spades, 6 of hearts, 5 of clubs and 10 of diamonds<br />
4) King of diamonds, on less waxy paper]]></dcterms:description>
    <dcterms:date><![CDATA[1810-1830]]></dcterms:date>
    <dcterms:format><![CDATA[diameter 195 mm]]></dcterms:format>
    <dcterms:format><![CDATA[paper, ink]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:201396b]]></dcterms:identifier>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9815">
    <dcterms:title><![CDATA[Wimshurst machine]]></dcterms:title>
    <dcterms:creator><![CDATA[unknown]]></dcterms:creator>
    <dcterms:date><![CDATA[1880?-1900?]]></dcterms:date>
    <dcterms:format><![CDATA[diameter of plates 483 mm]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:200103a]]></dcterms:identifier>
    <dcterms:coverage><![CDATA[unknown]]></dcterms:coverage>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9816">
    <dcterms:title><![CDATA[box of spectrometer pieces]]></dcterms:title>
    <dcterms:description><![CDATA[mixture of items from 3 light bulbs to a block of wood]]></dcterms:description>
    <dcterms:date><![CDATA[1800]]></dcterms:date>
    <dcterms:format><![CDATA[box: 240 x 160 x 120mm]]></dcterms:format>
    <dcterms:format><![CDATA[glass, metal, wood]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:200632a]]></dcterms:identifier>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9817">
    <dcterms:title><![CDATA[Pulse Height Analyser]]></dcterms:title>
    <dcterms:description><![CDATA[IDL Pulse Height Analyser &quot;Pulse Height Analyser 1870&quot; 2 Controls: Auto/Manual, Threshold; 1 channel width switch; with voltmeter 0 - 50V by Isotopes Development Ltd 1870A Serial Number 76.  Blue crackle metal case.]]></dcterms:description>
    <dcterms:creator><![CDATA[IDL]]></dcterms:creator>
    <dcterms:date><![CDATA[1970-1980]]></dcterms:date>
    <dcterms:format><![CDATA[500 mm, 340 mm deep, 160 mm high]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:201947a]]></dcterms:identifier>
    <dcterms:coverage><![CDATA[Aldermaston, England]]></dcterms:coverage>
</rdf:Description><rdf:Description rdf:about="https://exhibitions.abdn.ac.uk/university-collections/document/9818">
    <dcterms:title><![CDATA[External modem]]></dcterms:title>
    <dcterms:description><![CDATA[Used with BBC computer.  no makers name; with phone connection wire]]></dcterms:description>
    <dcterms:date><![CDATA[1985-1995]]></dcterms:date>
    <dcterms:format><![CDATA[205 mm wide x 175 mm deep x 50 mm high]]></dcterms:format>
    <dcterms:identifier><![CDATA[ABDNP:201928a]]></dcterms:identifier>
</rdf:Description></rdf:RDF>
