Polished mahogany box containing a kit for magnetic experiments assembled by George Adams Junior, who described them in his An Essay on Electricity (London, 1784) and Lectures on Natural and Experimental Philosophy (London, 1794). The kit is not complete, but the following items are included: steel horseshoe magnet with steel suspension ring; small magnetic dip needle on brass base; brass pivot with scale to show magnetic declination; several brass pivots for small magnetic needles; turned ebony box with iron filings to show the lines of force by scattering the filings on a sheet of paper or glass plate with the magnet placed beneath. There are also several bar magnets. Provenance: Lorraine collections.