_Glass_, metals forced into, by an electric explosion, 30 _Gun-powder_ fired by an electric explosion, 30 I _Jack_, the electrical, 94 _Jar_, electrical, fractured, how repaired, 70 K _Kite_, Dr. Franklin’s experiment with a, 40 —— _electrical_, structure and use of the, 41 —— —— Cavallo’s directions for using the, 43 L _Lane’s_ discharging electrometer, 67 _Leyden phial_ described, 26 —— —— experiments with the, 27 —— vacuum, 81 _Light, electric_, experiment with, 79 —— —— flashing between two metallic plates, 83 _Lightning_, the identity of with electricity, 40 —— _rods_, the structure and use of, 48, 54 —— —— improved by professor Patterson, 51 _Luminous_ conductor, 82 —— to render various substances, 84 —— shower, 102 M _Machine_, electrical, described, 9 _Magic_ picture, 86 _Magnetic needle_, effect of electricity on the, 31 _Medical_ electricity, 63 _Metallic oxyds_ revivified, 31 _Metals_ forced into glass by an electric explosion, 30 N _Natural state_, meaning of, 2 _Nollet’s Abbè_, theory of electricity, 110 _Non-electrics_, 2, 7 O _Oxyds_, metallic, revivified, 31 P _Paint_, for electrical purposes, preparation of, 126 _Paper_ stained by an electric explosion, 31 _Picture_, magic, 86 _Pointed bodies_, their influence on electricity, 17, 92 —— —— phenomena attending, 17 —— —— conclusions respecting, 21 _Powder, gun_, fired by electricity, 30 _Prime-conductor_, 12 R _Repulsion_, electrical, 21 _Richman_, Professor, killed by atmospheric electricity, while making experiments with it, 42 _Rubber_, defined, 2 —— described, and directions respecting it, 10 S _Shower_, luminous, 102 _Snake_, electrical, 102 _Spark_, electric, 16 —— —— applied for curing deafness &c., 66 —— —— to render the, visible in water, 84 _Stream_ —— useful in curing diseases of the eye, 67 _Syphon_, the capillary, electrified, 100 T _Terms_, explanation of, 1 _Thermometer_, effect of electricity on the, 32 _Thunder-house_, experiments with the, 54 _Torpedo_, an account of the, 58 —— artificial, to make, 60 _Tube_, spiral, 83 —— the self-charging, 95 V _Vacuum_, what is meant by the term, 79 —— Leyden, 81 _Vegetables_, effect of electricity on, 61 _Velocity_ of electricity, 15, 29 W _Water_ decomposed by electricity, 103 _Wheels_, multiplying, may be added, with advantage, to an electrical machine, 12 —— self-moving, described, 74 _Wilson’s_ theory of electricity, 109