Summary
Pair of dip needles, 9 cm long, in a zinc case. Needles marked 'Dover, 3A and B', 'Dover 4A and B'. Used at Melbourne Observatory to measure changes in the Earth's magnetic field.
More Information
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                                Collection Names
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                                Collecting Areas
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                                Acquisition InformationTransfer from Melbourne Observatory, 1945 
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                                UserMelbourne Observatory, South Yarra, Greater Melbourne, Victoria, Australia 
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                                MakerDover, Charlton, Kent, England, Great Britain, circa 1880s-1900s 
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                                ClassificationPhysical sciences, Geophysics - geomagnetism, Measuring equipment 
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                                Category
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                                Discipline
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                                Type of item
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                                KeywordsDip Circles, Geophysical Apparatus & Instruments, Magnetic Instruments 
 
             
         
         
         
         
         
         
         
         
         
         
        