| Oz.

| Grs.
-- -------------------------------------------------------|------|-----|----- 1.

Oxygen, a gas, and supporter of combustion, | | | weighs | 103 | 2 | 335 | | | 2.

Carbon, a solid; found most nearly pure in charcoal.

| | | Carbon in the body combines with other | | | elements to produce carbonic-acid gas, and by | | | its burning sets heat free.