It is the residue of animal and vegetable putrefaction, and is a black body; when dry it is pulverulent, and when wet has a soft, greasy feel... It is the produce of organic power-a compound of carbon, hydrogen, nitrogen, and oxygen, such as cannot be chemically composed. (Albrecht Thaer)

It is the residue of animal and vegetable putrefaction, and is a black body; when dry it is pulverulent, and when wet has a soft, greasy feel... It is the produce of organic power-a compound of carbon, hydrogen, nitrogen, and oxygen, such as cannot be chemically composed.

Albrecht Thaer

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animal black body carbon compound dry hydrogen nitrogen organic oxygen produce putrefaction residue soft vegetable wet

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