I have a 1862 printing of a rare medical text, A Treatise On Gunshot Wounds by Thomas Longmore. It is stamped U.S.Army Hospital Department on the front cover signifying issuance to Union Medical Personnel during the Civil War.
I also have a 1864 printing of Dalton's Human Physiology. It was one of the text on the Surgeon General's list of books issued to the armies during the War. That is on eBay, link below. Hope all is well.
Civil War Medical Text