Single Contact Morse Code Key Base_Octagonal Eight aluminum-shank tuning forks tuned

Eight aluminum-shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9/16 to 7 1/8 inches

Pack of 12 metal lattice support clamps fitting rods up to 12

measuring period under different loads to isolate mass from weight

and storage between uses at the laboratory bench

showing the hexagonal bonding within each layer and the weak bonding between layers

Single Contact Morse Code Key Base_Octagonal Eight aluminum-shank tuning forks tunedPlated spring arm with press knob and a single contact stud, configured to make and break a circuit at the rhythm of a Morse code transmission for telegraph history demonstrations.