One in particular caught my eye. The book is "The Synopsis of the Course of Lectures on Materia Medica and Pharmacy, Delivered in the University of Pennsylvania, 1855.
What's fascinating about this book is that about half of the pages are blank, so someone could amend the lectures with their own notes. Even more interesting is that the notes look to have been taken over a number of years by various students.
I have never seen this in any of our other books and was surprised when I started flipping through it and found all of the hand-written notes.
Another interesting aspect of the book was the botanical notes on everything from camphor to calamine to cannabis.
It is always a lot of fun to share what I find on my desk.