ELECTRICITY.
17
£
Pocket electrical bottle, and ribbon for charging ditto 0 Electrophorus, for obtaining the spark . 15s. to 1
Plain ley den jars .... 4s. 6d. to 0
Medical ditto . . . . . 7s. 6d. to 0
Jars, mounted with electrometers, for regulating the
shock ..... 12s. to 1
Medical electrometer ... 5s. 6d. to 0
Pair of directors . . . . . 8s. to 0
Spark ball . . . . . Is. 6d. to 0
Boxes of amalgam .... Is. 6d. to 0
Chain, per yard ..... 6d. to 0
Insulated stools and chairs . • . Pis. to 5
Jointed discharger, with insulated handle . . 0
Electrical batteries of combined jars, £2 12s. 6d, to 10 Universal discharger, with press . ... 1
Luminous conductor . . . . 12s. to 1
Exhausted flasks, for the aurora borealis . . .0
Thunder house to explain the utility of conductors . 0
Powder house, for ditto ...... 0
Magic picture, for giving shocks .... 0
Electrical orrery ....... 0
Brass cup and syphon ...... 0
Set of three plain bells . ..... 0
Set of eight bells, containing the gamut . . .1
Electrical cannon, to be charged with a mixture of hydrogen gas and common air. . . .0
Brass pistols, for the same experiment . . .0
Ivory bomb, for fulminating silver . . . .0
Names, or words, to illuminate by the electrical spark
6s. to 0
Diamond spotted jars .... 10s. to 0
Jar, with movable coatings . . ... 0
A double jar, explaining the franklinian theory . 0
Insulated stand, for ditto . . . . .0
s. d.
7 6
15 0 14 0 lb 0
0 0 7 6
12 0 3 6 3 0 1 0
5 0 10 6 10 0 10 0 10 0
6 6 6 6
16 0
7 6
7 6 5 0 7 6
10 0
16 0 7 6
10 0
10 0 16 0 15 0 18 0 10 6
JQ