Compound microscope

1701-1723

Spyglass by Edward Nairne, 1749-1775

1749-1775

single opera glass (prospect glass; spy glass)

1745-1755

Spyglass, 1765

1751-1775

Longcase clock movement by John and James Harrison

1726-1728

Chromotrope, centre scene-windmill with moving sails

1890-1900

Prospect spyglass telescope with shagreen tube and horn or darkened ivory lens mounts

1745-1755

telescope (prospect glass; spyglass) 1-draw tube

1745-1755