拍品 76
76
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)

細節
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)