Brittleness, [29]
Buds in winter, [308]
Bulk, relation of, to resistance of liquids and gases, [193]
Camera obscura, [352]
Canals, [117]
Capillary attraction, [72], [86]
Cartesian image, [159]
Centre of gravity defined, [96]
Centre of gravity, support of, in animals, [106]
Centre of gravity, movements of, in walking, [107]