The Mercury's Plaint

I don't know why I'm slandered so,
If I go high,--if I go low,--
There's always some one who will say,
"Just see that mercury to-day!"
And whether toward the top I crawl
Or down toward zero I may fall,
They always fret, and say that I
Am far too low or far too high.
Although I try with all my might,
I never seem to strike it right.
Now I admit it seems to me
They show great inconsistency.
But they imply I am to blame;
Of course that makes my anger flame,
And in a fiery fit of pique
I stay at ninety for a week.
Or sometimes in a dull despair,
I give them just a frigid stare;
And as upon their taunts I think
My spirits down to zero sink.
Mine is indeed a hopeless case;
To strive to please the human race!