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                <text>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 .</text>
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              <elementText elementTextId="74730">
                <text>mercury</text>
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                <text>ABDNP:200137a</text>
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                <text>Mercury vapour arc rectifier</text>
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                <text>Unknown</text>
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            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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              <elementText elementTextId="74734">
                <text>1850-1950</text>
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                <text>Small brass telescope. Part of something.</text>
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                <text>length 195 mm, diam. 25 mm</text>
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                <text>metal, glass</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
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              <elementText elementTextId="74738">
                <text>ABDNP:200701a</text>
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            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>telescope</text>
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            <description>The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant</description>
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                <text>London (?)</text>
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            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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                <text>1897-1910</text>
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          <element elementId="41">
            <name>Description</name>
            <description>An account of the resource</description>
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                <text>One of two tubes have a spiral glass feature; presumed to have been acquired as a set with five others</text>
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            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
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              <elementText elementTextId="74743">
                <text>glass; wood; metal</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
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              <elementText elementTextId="74744">
                <text>ABDNP:200123d</text>
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            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>discharge tube demonstration</text>
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            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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              <elementText elementTextId="74746">
                <text>1830-1890</text>
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            <name>Description</name>
            <description>An account of the resource</description>
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                <text>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 'keeper' is separate</text>
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            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
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                <text>370mm long (including the keeper, 150mm wide 100mm high</text>
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                <text>soft iron, copper wire, brass</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
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              <elementText elementTextId="74750">
                <text>ABDNP:200499a</text>
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            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>electromagnet</text>
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            <name>Coverage</name>
            <description>The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant</description>
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              <elementText elementTextId="74752">
                <text>Beenham, Reading, England</text>
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            <name>Creator</name>
            <description>An entity primarily responsible for making the resource</description>
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              <elementText elementTextId="74753">
                <text>IDL</text>
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          <element elementId="40">
            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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                <text>1965-1975</text>
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          <element elementId="41">
            <name>Description</name>
            <description>An account of the resource</description>
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                <text>IDL Scaler 1800, 4 Push Button Switches: Start, Stop, Reset, Test; 5 Dekatrons; Type: 1800C, Serial No. 178, a range of inputs</text>
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          </element>
          <element elementId="42">
            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
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              <elementText elementTextId="74756">
                <text>500 mm, 340 mm deep, 160 mm high</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
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              <elementText elementTextId="74757">
                <text>ABDNP:201948a</text>
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          <element elementId="50">
            <name>Title</name>
            <description>A name given to the resource</description>
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              <elementText elementTextId="74758">
                <text>Scaler 1800</text>
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            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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                <text>1810-1830</text>
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          <element elementId="41">
            <name>Description</name>
            <description>An account of the resource</description>
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                <text>4 anamorphic drawings on circular sheets of waxy paper.  Small hole in centre of sheets:
1)  Bird of paradise in blue, red and green.
2) stork in black and white with red beak and legs and green frog in its mouth
3) diagram of four overlapping playing cards around 360 degrees. King of spades, 6 of hearts, 5 of clubs and 10 of diamonds
4) King of diamonds, on less waxy paper</text>
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            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
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                <text>diameter 195 mm</text>
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                <text>paper, ink</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
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              <elementText elementTextId="74763">
                <text>ABDNP:201396b</text>
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            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>Anamorphic drawings</text>
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            <name>Coverage</name>
            <description>The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant</description>
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              <elementText elementTextId="74765">
                <text>unknown</text>
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            <name>Creator</name>
            <description>An entity primarily responsible for making the resource</description>
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                <text>unknown</text>
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            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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              <elementText elementTextId="74767">
                <text>1880?-1900?</text>
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            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
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              <elementText elementTextId="74768">
                <text>diameter of plates 483 mm</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
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              <elementText elementTextId="74769">
                <text>ABDNP:200103a</text>
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            </elementTextContainer>
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          <element elementId="50">
            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>Wimshurst machine</text>
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          <element elementId="40">
            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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                <text>1800</text>
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          <element elementId="41">
            <name>Description</name>
            <description>An account of the resource</description>
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              <elementText elementTextId="74772">
                <text>mixture of items from 3 light bulbs to a block of wood</text>
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            </elementTextContainer>
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          <element elementId="42">
            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
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              <elementText elementTextId="74773">
                <text>box: 240 x 160 x 120mm</text>
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                <text>glass, metal, wood</text>
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            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
            <elementTextContainer>
              <elementText elementTextId="74775">
                <text>ABDNP:200632a</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="50">
            <name>Title</name>
            <description>A name given to the resource</description>
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              <elementText elementTextId="74776">
                <text>box of spectrometer pieces</text>
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            </elementTextContainer>
          </element>
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  <item itemId="9817" public="1" featured="0">
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          <element elementId="38">
            <name>Coverage</name>
            <description>The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant</description>
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              <elementText elementTextId="74777">
                <text>Aldermaston, England</text>
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            </elementTextContainer>
          </element>
          <element elementId="39">
            <name>Creator</name>
            <description>An entity primarily responsible for making the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74778">
                <text>IDL</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="40">
            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
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              <elementText elementTextId="74779">
                <text>1970-1980</text>
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            </elementTextContainer>
          </element>
          <element elementId="41">
            <name>Description</name>
            <description>An account of the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74780">
                <text>IDL Pulse Height Analyser "Pulse Height Analyser 1870" 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.</text>
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            </elementTextContainer>
          </element>
          <element elementId="42">
            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74781">
                <text>500 mm, 340 mm deep, 160 mm high</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="43">
            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
            <elementTextContainer>
              <elementText elementTextId="74782">
                <text>ABDNP:201947a</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="50">
            <name>Title</name>
            <description>A name given to the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74783">
                <text>Pulse Height Analyser</text>
              </elementText>
            </elementTextContainer>
          </element>
        </elementContainer>
      </elementSet>
    </elementSetContainer>
  </item>
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      <elementSet elementSetId="1">
        <name>Dublin Core</name>
        <description>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/.</description>
        <elementContainer>
          <element elementId="40">
            <name>Date</name>
            <description>A point or period of time associated with an event in the lifecycle of the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74784">
                <text>1985-1995</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="41">
            <name>Description</name>
            <description>An account of the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74785">
                <text>Used with BBC computer.  no makers name; with phone connection wire</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="42">
            <name>Format</name>
            <description>The file format, physical medium, or dimensions of the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74786">
                <text>205 mm wide x 175 mm deep x 50 mm high</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="43">
            <name>Identifier</name>
            <description>An unambiguous reference to the resource within a given context</description>
            <elementTextContainer>
              <elementText elementTextId="74787">
                <text>ABDNP:201928a</text>
              </elementText>
            </elementTextContainer>
          </element>
          <element elementId="50">
            <name>Title</name>
            <description>A name given to the resource</description>
            <elementTextContainer>
              <elementText elementTextId="74788">
                <text>External modem</text>
              </elementText>
            </elementTextContainer>
          </element>
        </elementContainer>
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