4 different sets of balances. Chinese balances in bamboo carrying cases known as Dotchins. They were used in the Chinese market place for weighing gold currency that consisted of irregular pieces stamped with their purity; violin-shaped wooden case…
4 black metal plates joined together by 8 white rods through all 4 plates. In between the plates are various wires also connecting them and outside the plates on one side are resistors also connecting the plates. There is one grey piece of metal on…
Demonstration of air resistance. Double windmill each with 4 vanes : first set vanes fixed perpendicular to direction of motion; second set of vanes can be rotated individually around axis of support arm to give range of resistance from…
3/4 portrait of James Fraser, seated and facing right, with head towards viewer. Long grey periwig, wearing brown coat, white cravat, floppy lace cuffs and a tan waistcoat. Left hand holds book on table with spine up on a green drape background.…
Instrument for showing that a compass needle not only points to magnetic north but if freely suspended will point into the ground. This later phenomenon is known as the 'dip' of the compass needle. Horizontal scale 0 -90 in 1/20 on either side of N…
Small wooden drawer of miscellaneous items including brass tweezers, rotating aperture selector, eyepiece, a lens and screws. Drawer has an ivory handle and used to hold slides or lenses as grooves set in wood.
Wooden set of 8 drawer, 4 of which have dividers with grooves for holding lenses. The drawers hold a large variety of lenses; over 200 lenses in total as well as mirrors, diffraction gratings, a liquid prism and a lens power tester.