One of the beautiful gatefold illustrations in Robert Hooke's Micrographia. The book, detailing the then twenty-eight year-old Hooke's observations through various lenses was published in September, 1664, and was an immediate best-seller. Hooke most famously describes a fly's eye and a plant cell (where he coined that term because plant cells, which are walled, reminded him of monks' chambers). Known for its spectacular copperplate engravings of the miniature world, particularly its fold-out plates of insects, the text itself reinforces the tremendous power of the new microscope. The plates of insects fold out to be larger than the large folio itself, the engraving of the louse in particular folding out to four times the size of the book.