Pendulum made by E. Johnson
Pendulum made by E. Johnson, Clerkenwell. It is a long metal rod with brass elements on each end one end had two balls on it.
Pendulum for determining a standard unit of length. Made by E. Johnson
- Made:
- Clerkenwell
Pendulum for determining a standard unit of length. Made by E. Johnson, Clerkenwell
Details
Parts
Pendulum made by E. Johnson
Pendulum made by E. Johnson, Clerkenwell. It is a long metal rod with brass elements on each end. Both ends look like they have adjustment screws at each end.
Component for pendulum made by E. Johnson
Component for pendulum made by E. Johnson, Clerkenwell. It is a wooden element with a brass plate screwed on, with two adjustment screws, possibly for adjusting pendulums.
Component for pendulum made by E. Johnson
Component for pendulum made by E. Johnson, Clerkenwell. A metal disc with a groove cut in the middle and a channel cut into the centre. It also has two other metal elements screwed onto it protruding from each side.
