PERIOD OF CIVILIZATION
RECAPITULATION
OLDER PERIOD OF SAVAGERY.—From the infancy of the human race to the knowledge of fire and the acquisition of fish subsistence.
MIDDLE PERIOD.—From the acquisition of a fish subsistence to the invention of the bow and arrow.
LATER PERIOD.—From the invention of the bow and arrow to the invention of the art of pottery.
OLDER PERIOD OF BARBARISM.—From a knowledge of pottery to the domestication of animals in the eastern hemisphere, and in the western to the cultivation of maize and plants by irrigation.
MIDDLE PERIOD.—From the domestication of animals, &c., to the invention of the process of smelting iron ore.
LATER PERIOD.—From the knowledge of iron to the invention of a phonetic alphabet, or the use of hieroglyphs upon stone as an equivalent.
CIVILIZATION.—From the invention of a phonetic alphabet and the use of letters in literary composition to the present time.]