Part 100

Capillary tubes, 18.

Centre, 48. of gravity, 48, 51, 52, 115. of magnitude, 48, 53. of motion, 48, 55, 115.

Centrifugal force, 49, 72, 95, 115.

Centripetal force, 49, 72.

Ceres, 84.

Circle, 44, 94.

Circumference, 94.

Clouds, 129.

Colours, 23, 185.

Comets, 86.

Compression, 42.

Concord, 155.

Constellation, 86.

Convergent rays, 175, 177.

Crystals, 12.

Curvilinear motion, 47, 72.

Cylinder, 52.

Day, 78, 105, 106.

Degrees, 44, 94, 99, 169, 170. of latitude, 94, 112. of longitude, 94, 112.

Density, 16.

Diagonal, 47.

Diameter, 94.

Discords, 155.

Diurnal, 78.

Divergent rays, 175, 177.

Divisibility, 10, 12.

Earth, 18, 70, 84, 88, 95.

Echo, 154.