Centennial on the Brain

From a music sheet of 1876,

"Sung with great success by Little Jenny Quigley"

The people have gone crazy, away from all restraint.
For one and all, both great and small, have got a strange complaint.
It's spread the country over from Texas up to Maine,
A sort of epizootic, centennial on the brain.

Chorus:
Hoorah for '76, hoorah, and Yankee doodle-doo.
Then ring the bells, and beat the drums, and blow the trumpets too.
We'll never see so big a time in all this world again. 
Yes, we are mad, we've got it bad, centennial on the brain.

We hear it gossiped over, in all the people say.
While children howl and babies squall centennial night and day,
We get it for our dinner and supper too again,
In fact were almost crazy, centennial on the brain.

If things don't reach a focus inside the present year,
With one big crash we'll go to smash, and leave this troubled sphere.
Then they will raise a tombstone, and write in letters plain,
"This glorious country died of centennial on the brain."

There were many ___ on the Brain songs, Mother on the Brain, Chestnuts on the Brain, etc.