Emily Dickinson's writing style is most certainly unique. She used extensive dashes, dots, and unconventional capitalization, in addition to vivid imagery and idiosyncratic vocabulary. Instead of using pentameter, she was more inclined to use trimester, tetrameter, and even dimeter at times.
The word extract means to "take out" or "draw out". Knowing this you can assume that the "Pair of tweezers" has something to do with taking the splinter out.
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