Assertion: peat | /r/MadeOf | 30–40 percent oxygen
Facets:
value: by combustible weight
type: OTHER
Source sentences:
text: By combustible weight, peat consists of 50–60 percent carbon, 5–6.5 percent hydrogen, 30–40 percent oxygen, 1–3 percent nitrogen, and 0.1–1.5 (sometimes 2.5) percent sulfur.