Herb:
Check out these web sites for information about hand grenades used during the Civil War:
http://kms.kapalama.ksbe.edu/projects/civilwar/battle02/
scientist.html
http://www.ehistory.com/uscw/features/articles_new/display.cfm?nationId=62
Just scroll down to "hand grenades." Also, I have a record of hand grenades used by the Confederate infantry during the trench fighting around Atlanta in August 1864....Joe Ashley