WHAT IS ELECTRICITY? -- MEANS OF EXCITING ELECTRICITY -- ELECTRIFIED
AND NON-ELECTRIFIED BODIES -- CONDUCTORS AND NON-CONDUCTORS OF
ELECTRICITY -- ELECTRICAL MACHINES -- POSITIVE AND NEGATIVE
ELECTRICITY -- VELOCITY OF ELECTRICITY -- PRINCIPAL AGENTS IN NATURE
EXCITING ELECTRICITY -- LIGHTNING -- THREE FORMS OF LIGHTNING --
SHEET AND HEAT LIGHTNING -- DURATION OF A FLASH OF LIGHTNING --
PLACES DANGEROUS IN A THUNDER STORM -- HOW A TREE INFLUENCES
LIGHTNING -- LIGHTNING CONDUCTORS -- THEIR PROPER PRINCIPLE OF
CONSTRUCTION -- FRANKLIN’S EXPERIMENT WITH A KITE -- IDENTITY OF
LIGHTNING AND ELECTRICITY -- UTILITY OF LIGHTNING-RODS -- WHAT IS
THUNDER? -- WHAT OCCASIONS THE ROLLING OF THUNDER? --
AURORA-BOREALIS -- EXTENT OF THE AURORA -- HEIGHT OF THE AURORA --
APPEARANCE -- AURORA-BOREALIS OCCURS IN THE DAY-TIME -- WHAT IS
GALVANISM? -- HOW GALVANIC ELECTRICITY WAS DISCOVERED --
CONSTRUCTION OF A GALVANIC BATTERY -- ORIGIN OF THE TERM “GALVANISM”
-- POLES OF A BATTERY -- MEANS BY WHICH GALVANIC-ELECTRICITY IN
QUANTITY CAN BE DEVELOPED -- DIFFERENT FORMS OF GALVANIC BATTERIES
-- LIGHT AND HEAT PRODUCED BY GALVANISM -- PRINCIPLES AND PROCESSES
OF ELECTRO-METALLURGY -- MAGNETISM -- NATURAL MAGNETS -- WHERE FOUND
-- BODIES CAPABLE OF BEING MAGNETIZED -- INDUCTION -- MAGNETIC
NEEDLE -- THE MAGNETIC COMPASS -- DISCOVERY AND FIRST USE OF THE
COMPASS -- ELECTRO-MAGNETISM -- WHEN AND HOW DISCOVERED -- HOW IRON
BARS BECOME MAGNETIC -- HORSE-SHOE MAGNETS -- EXCITATION OF
MAGNETISM -- MORSE’S MAGNETIC TELEGRAPH -- TELEGRAPH, MAGNETIC,
PRINCIPLES OF -- INTELLIGENCE, HOW CONVEYED BY -- ELECTRIC DYNAMO
AND MOTORS -- WIRELESS TELEGRAPHY -- WIRELESS TELEPHONE -- X-RAYS