Rarefied Words for the Well-Rounded Reader By Jack Lynch

"Rarefied Words for the Well-Rounded Reader from Samuel Johnson's Dictionary of 1755" is a specific product, a knowledge card deck, that presents unusual and less common words from that historical dictionary to improve vocabulary. It is not a general concept but a particular set of flashcards designed for people who want to expand their vocabulary with archaic or sophisticated terms from an influential source.

These are uncommon, sophisticated, or unusual words that might not be in everyday vocabulary. 

The target audience is someone who wants to become a more cultured or educated person, often by expanding their language skills. 

In essence, this product helps readers learn and use words from a bygone era of English, which can contribute to a more comprehensive understanding of language and a more sophisticated vocabulary.