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Updated: May 13, 2025
This has not yet been effected; but it is known to be only a chemical process, the mode of which may be any day discovered in the laboratory, and two compounds perfectly co-ordinate, urea and alantoin, have actually been produced. In such an investigation as the present, it is not unworthy of notice that the production of shell is a natural operation which can be precisely imitated artificially.
Some of the proximate principles of vegetable and animal bodies, such as urea and alantoin, are said to have been produced artificially by the chemist; and in the combination of the simple elements, such as carbon and oxygen, into these proximate principles, it is now acknowledged that there is no violation of the ordinary laws of chemical affinity.
Vegetable and animal bodies are mainly composed of the same four simple substances or elements carbon, oxygen, hydrogen, and nitrogen. The first combinations of these in animals are into what are called proximate principles, as albumen, fibrin, urea, alantoin, &c., out of which the structure of the animal body is composed.
Now the chemist, by the association of two parts oxygen, four hydrogen, two carbon, and two nitrogen, can MAKE UREA. Alantoin has also been produced artificially. Two of the proximate principles being realizable by human care, the possibility of realizing or forming all is established. Daubeny, that in the combinations forming the proximate principles there is no chemical peculiarity.
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