A late 19th Century Wheatstones Apparatus for showing the independance of the plane of oscillation in relation to other motions, the principal iron stand, nine graduated vibration needles and double ended spanner contained in a pyramid shaped mahogany case with brass carrying handle; and a supplementary case containing eight fitted and one loose vibration needle, with a membership card inscribed ATHENAEUM Honorary Members card for His Excellency Wooyeni Kagenou Envoy Extraordinary and Minister Plenipotentiary from Japan J.L. Webster Secretary February 13th 1875 Proposed by Dr Pole F.R.S., the reverse used as a descriptive card