This poem by Robert Herrick alternates iambic tetrameters and dimeters:
Lord, Thou hast given me a cell
Wherein to dwell,
A little house, whose humble roof
Under the spars of which I lie
Both soft, and dry;
Where Thou my chamber for to ward
Hast set a guard
Of harmless thoughts, to watch and keep
Me, while I sleep
Christina Rossetti, in "De Profundis" ends her tetrameter stanzas with a dimeter:
Oh why is heaven built so far,
Oh why is earth set so remote?
I cannot reach the nearest star
That hangs afloat.
And Ebenezer Elliott, in "Battle Song," uses this meter:
In vain your pomp, ye evil powers,
Insults the land;
Wrongs, vengeance, and the Cause are ours,
And God's right hand!
Madmen! they trample into snakes
The wormy clod!
Like fire, beneath their feet awakes
The sword of God!