Asa Gray , American scientist
said about Animals, Being, Plants, Years...
"Many years ago it was taught that plants and animals were composed of different materials: plants, of a chemical substance of three elements,- carbon, hydrogen, and oxygen; animals of one of four elements, nitrogen being added to the other three."
- Asa Gray Read all Asa Gray quotes, or find out more about Asa Gray
"Many years ago it was taught that plants and animals were composed of different materials: plants, of a chemical substance of three elements,- carbon, hydrogen, and oxygen; animals of one of four elements, nitrogen being added to the other three."- Asa Gray