A drop fell on the apple tree
Another on the roof
A half a dozen kissed the eaves
And made the gables laugh
A few went out to help the brook
That went to help the sea
Myself conjectured, Were they pearls
What necklaces could be!
The dust replaced in hoisted roads
The birds jocoser sung
The sunshine threw his hat away
The orchards spangles hung
The breezes brought dejected lutes
And bathed them in the glee
The East put out a single flag
The orchard (referring back to the apple tree from the first line) is sparkling in the sunlight. 
 Spangles  are a type of glittery decorative material. 

Summer Shower