18
VOLTAIC ELECTRICITY.
£ S. d.
Sets of conductors and jars, for exhibiting electricity by induction . . . . £1 to
Gold cylinders, for ditto, in sets ....
Volta’s condensor, with adjusting screw .
Plates and stands, for dancing images
Small head, with hair ......
Electrical fly .......
Electrical stars, birds, swans, &c. . 3s. 6d. to
Electrical tin fire house ......
Mahogany stand, for eggs .....
Shooter and mark .......
Sportsman and bird . . . . £1 4s. to
Balls of wood, bone, brass, &c. . . 6d. to
Electrical cylinders, for mounting . . 2s. 6d. to
A collection of models, all delicately made of card paper, cork, and wire, worked by the electrical fluid ; consisting of an astronomical clock, an orrery, a corn mill, and a three barrelled pump, packed in a box ......
Quadrant electrometer ......
Kinnersly’s electrical air thermometer
Cavallo’s atmospheric electrometer ....
Bennett’s gold leaf ditto ......
Coulomb’s electrical balance of torsion Singer’s improved electrometer, the leaves of which will remain diverged for a considerable time . Ditto, with a condenser . . . £l Ils. to
Discharging electrometer, in which the forces are denoted by grain weights ....
Pith balls, and figures for electricity
2 0 0 0 5 0 1 15 0 0 9 0
0 7 6
0 5 0
0 10 6 0 12 0 0 5 6 0 5 6 1 10 0 0 2 0 0 12 0
3 3 0
0 7 6
1 0 0 0 10 6 0 18 0 1 10 0
1 0 0 2 10 0
1 18 0
VOLTAIC ELECTRICITY.
Silver, copper, and zinc plates, for forming the voltaic pile, per dozen . . . . 2s. to
0 12 .