A mahogany dip-circle demonstration apparatus by W.G. Pye & Co. Cambridge, on mahogany base - 17½ins. (44.5cm.) wide; and another dip-circle and magnetic field demonstration apparatus by Philip Harris Limited on base - 21½ins. (54.6cm.) high. (2)
A mahogany dip-circle demonstration apparatus by W.G. Pye & Co. Cambridge, on mahogany base - 17½ins. (44.5cm.) wide; and another dip-circle and magnetic field demonstration apparatus by Philip Harris Limited on base - 21½ins. (54.6cm.) high. (2)
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