Concave wooden disc attached to a glass rod, part of a globe electrostatic machine
1780-1798
Felt discs
Components used in rabbit ear chamber research
1950-1980
Floppy disks from Apricot portable computer
1984
Recording discs for Emidicta Model 2403 recorder for GPO use
End disc from destination indicator
Small silver disc engraved with an early design of Sir George Cayley
1799