You learn that “the different parts of the throat are called the oropharynx, the hypopharynx, and the nasopharynx.”

But it also said “there is sufficient evidence of a causal association between formaldehyde and cancers of the nose, nasal cavity, and nasopharynx.”

At 3.45 P.M. they had been all reëxamined by the doctor, and a few tag ends were picked out of the nasopharynx of one child.