Nitrogen and Carbon Diagram Illustrations

Created for an upcoming anthropological publication about life in Poland in the 16th through 18th centuries. I was asked to create a diagram showing the various levels of nitrogen in people's diets at that time and place, and a diagram showing carbon 12 and 13 atoms.

Nitrogen diagram, showing the nitrogen level of plants and animals that would be consumed by a Polish person in the 16th through 18th centuries.
Diagram showing the difference between carbon 12  and carbon 13 atoms.
Animal sketches.
Plant sketches.
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