Please see all photos, as they are part of the description. The item "C1848 DANIEL DAVIS Boston Joseph Henry Electro-Magnet Demonstration HELIX COIL" is in sale since Monday, September 30, 2019. This item is in the category "Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Other Antique Science Equip". The seller is "artsandsciences" and is located in Atlanta, Georgia. This item can be shipped worldwide.