Classic Poem

Mine to watch the sun at work
Or if he hide in clouds & shirk
I test the force of wood & bark,
And keep the pitcoal to the mark
On my white enamelled scale
The warning numbers never fail
From sixty up to seventy one
The grades of household comfort run
If they climb a hairsbreadth higher
Fling wide the door, put out the fire,
Each year will have its holidays
Which I report nor blame nor praise
Twice I dive twenty below zero
Twice climb to heat would blacken Nero
But health & heart will prosper more
At the mean point of 54