Chyme, b. [453].
Circles of the sphere, a. [128].
Circular polarization, b. [82], [119].
Circular progression (in Natural History), b. [418].
Civil year, a. [117].
Climate, b. [146].
Coexistent vibrations, a. [376].
Colures, a. [131].
Conditions of existence (of animals), b. [483], [492].
Conducibility, b. [143].