Browse Items (47 total)
- Collection: Copland Teaching Apparatus
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Electrostatic generator. A green glass ball mounted on a spindle with a crank in a wooden frame, with a cushion pressing against the bottom of the ball.
NB: The 1823 inventory of Copland's collection lists some glass globe generators like this one, but the provenance of this generator is unknown. It is certainly of an 18th century design so Copland would have had one very similar at least. While it…
Dip quadrant. A long steel needle mounted on a brass stand allowing it to rotate in one direction. An arc of brass projects from the base of the stand in the same direction as the rotation of the needle. The arc is marked with a degrees scale.
For determining the angle of tilt from the vertical of the local magnetic field. Brass dip quadrant calibrated at 2 degree intervals from 0 (at bottom) to 84 degrees on circular brass base with embeeded lead weight. Pivoted lozenge-shaped needle…
Combustion tube. A glass tube about 40 centimetres long with brass fittings and turned wooden knobs on either end. On one end the knob can be pulled or pushed to operate a plunger inside the tube.
Thick glass tube with hand operated piston with brass end caps; wooden 'doorknob' handles at either end; inflammable vapour is inserted into tube (ether?) and then compressed firmly with piston; when compression is high enough the vapour…
Spark or flicker tube. A glass tube with bulbous brass ends and a spiral of silver metal dots running along the inside.
Glass tube with brass ends; with ball terminals; inside tube is spiral of small metal discs each seperated by gap of less than 1 mm; when tube is placed across an electrostatic generator, a spiral discharge is seen around inside of tube caused by…
Insulating stand. A thin brass disc about 15 centimetres wide on a glass pillar with a turned wooden base.
Wooden base with glass pillar and brass table for electrostatic experiments.
Suction pump. A glass tube with a small brass fitting covering the top and a larger one on the bottom. Hinged on to the bottom fitting is a brass plunger with the end wrapped in fabric, operated with a lever. A small pipe also projects from the bottom fitting.
Wooden box containing demonstration suction pump in two parts; glass barrel illustrates operation of two valves, one at base of barrel and one in piston; instrument sits on velvet cloth and there seem to be space for other instrument. Matches item in…
Discharging tongs. Two metal rods with balls on the end fixed to a glass rod with a wooden handle. The metal rods are mounted on wheels allowing them to be rotated together or apart.
twin brass rods hinged at one end fitted on a glass insulating rod and wooden handle. Each rod terminates in a brass sphere; for removal of charge from electrostatically charged spheres. Likely to be one of Copland's "Discharging rod, jointed, glass…
Oscillating prism. A small glass prism connected to a brass mechanism with a crank.
Equiangular triangular prism, 13 mm side x 43 mm long (incl. brass ends) setting vertically on base made to oscillate 6 times for every rotation of an ivory handle. Could be the device mentioned in Copland's inventory. The design is very similar to…