The sheet identifies this miniature as part of The Physical Revue (1951) and credits the musical setting to Arthur Sullivan's Hail, Poetry from The Pirates of Penzance. Lehrer's eight-line replacement text turns a grand tribute into a small joke about self-regard. The repeated It's us lines are both present; the catalog reproduces only the words.
Hail, Chemistry!
We can't ignore
The truth that you're looked up to for.
Hail, Chemistry!
We can't deny
It's us
It's us
Whom you're well thought of by.