| LH 15.51 | Kundt’S Tube Apparatus (On Wooden Board With 1 Meter Glass Tube) For Showing The Wave Length Of Vibrations In Air In A Close Tube By The Lycopodium Powder, |
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| LH 15.51 | Kundt’S Tube Apparatus (On Wooden Board With 1 Meter Glass Tube) For Showing The Wave Length Of Vibrations In Air In A Close Tube By The Lycopodium Powder, |