00727cam a2200193 4500 410706986 TxAuBib 20190117120000.0 200114s2020||||||||||||||||||||||||eng|u 61169 Project Gutenberg PGUSA eng TxAuBib Kanmacher, Frederick, 1750-1795. Essays on the Microscope [Gutenberg] : Containing a Practical Description of the Most Improved Microscopes, a General History of Insects, etc., etc / Frederick Kanmacher. Project Gutenberg, 2020. Public domain in the USA. Text. Insects -- Early works to 1800. Microscopy -- Early works to 1800. http://www.gutenberg.org/ebooks/61169