Company B., 36th Iowa Infantry (findagrave.com)
Harsin, James V. Age 25. Residence Kirkville, nativity Kentucky. Enlisted Aug. 4, 1862.
Mustered Sept. 3, 1862. Discharged for disability May 4, 1863, Benton Barracks (St. Louis), Mo. (http://iagenweb.org/civilwar/books/logan/mil705.htm)
One record has death date as 8/15/1863, two others as 8/17/1863.
The 1850 census and U.S., Civil War Soldier Records and Profiles, 1861-1865 state he was born in Kentucky. His parents married three years before his birth in Indiana and his siblings were born in Indiana. The 1850 is the only census I find him listed in. Findagrave has his birth in Indiana.