LECTURE I.
PAGE
THE FORCE OF GRAVITATION, 13
LECTURE II.
GRAVITATION--COHESION, 44
LECTURE III.
COHESION--CHEMICAL AFFINITY, 72
LECTURE IV.
CHEMICAL AFFINITY--HEAT, 99
LECTURE V.
MAGNETISM--ELECTRICITY, 122
LECTURE VI.
THE CORRELATION OF THE PHYSICAL FORCES, 147