Browse Items (3473 total)

Twin galvanometer for use with a lecture demonstration projector; with centre transparent zero scales, '30-0-30'; flat construction allowing device to be clipped onto a projector in place of normal slide so that galvanometer scales are seen greatly…

on three truncated cone legs. A brass cylinder with two thumbscrew terminals. A mirror is suspended from the needle in a windowed cylinder. Onwood's patent No. 7035 NP40392

a mirror galvanometer with small upper and larger lower cylinders in lacquered brass. The lower cylinder is surrounded by an brass ring with three brass terminals. Three adjustable brass feet are fitted to the ring. The larger cylinder has a glass…

mounted on three brass adjustable feet, a sub rectangular black wooden base holds two upright hinged wood plates. The plates each have terminals connecting to flat coils. On one side is a viewing window into the centre of the plates. A hollow rod…

Has one coil forming a vertical loop. There is a screw terminal at the zenith possible for suspending a magnetic pointer. In the centre is a +/- 90 degree dial on the horizontal wooden shelf. All are mounted on an brass pedestal with ebonite base…

on a triangular wooden base with three adjustable feet. Two vertical wooden circular frames separated by four brass rods, hold wire coils connected to four brass terminals. In the middle a turned wood pedestal holds a horizontal circular scale of…

Mouth gag in iron.

Gaelic prayer book, shown here with a key. See extract of letter in Thomson file: Letter from the Rev Mr Watson (F C) Langholm 1863: 'I told you that I possessed the 'Book of Power' wherewith a wizard or 'wise man' in the island of Lewis held in…

two pieces of fur and fleece, possibly lamb and artificial fur. For stroking glass rods to create electrostatic charge