Accession No

4426

Brief Description

Projecting Lissajous’ apparatus, by Secretan, French, 1870 (c)

Origin

France; Paris

Maker

Secretan Marc Francois Louis

Class

optical; physics; demonstration

Earliest Date

1870

Latest Date

1870

Inscription Date

Material

wood (mahogany); metal(brass, iron, steel); glass; rope (string)

Dimensions

length 453mm; height 427mm; breadth 198mm

Special Collection

Provenance

Inscription

‘1563
F.S’ (brass plaque screwed to base)

Description Notes

wooden base with 2 brass feet and 1 brass levelling screw. Wooden frame supports iron flywheel with wooden handle which turns a wheel on a spindle, divided 0 - [3 1/2], numbered by 1 graduated to 1/2. The spindle moves 2 lenses, one of which moves in a vertical plane, the other in a horizontal plane. Behind the lenses is a circular disc with a pin hole, allowing light from the sun or a lamp to be projected through the lenses onto a screen.

Condition good (string too loose for movement of lenses); complete

References

Events