I found out about this author from a National Geographic Article: 'Lost' book of exquisite scientific drawings rediscovered after 190 years --- and the 3 volumes are available on Hathi Trust here. The author died young (46 years old) in 1828 and her work was not finished so it is in manuscript rather than published form. It had still been referenced a few times in the 1800s and those references are what started the search for it. Eventually, it was determined that the manuscript had been given to Cornell University in 1923 by a faculty member that was a descendant of the author. It had been in Cornell’s Rare and Manuscript Collection since! These volumes are well worth browsing. I’ve included sample images below…..but there are many more in the volumes to look at online.