| RefNo | PP/16/16/6 | 
| Previous numbers | PP/48/16 | 
| Level | Item | 
| Title | Diagram, 'Plan of arrangements for observing the spectra of the heavenly bodies by the aid of a siderostat' by J [Joseph] Norman Lockyer | 
| Date | 1889 | 
| Description | A schematic diagram showing the setup of Lockyer's equipment, which includes a siderostat [heliostat], a ten-inch object glass and support, a four-prism Steinheil spectroscope, collimator, spark stand, induction coil, reflecting eyepiece and lamp. Includes a note to the engraver. 
 Subject: Spectroscopy / Astronomy
 
 A print of this diagram was published in volume 48 of the Proceedings of the Royal Society alongside the paper 'On the chief line in the spectrum of the nebulæ'.
 | 
| Extent | 1p | 
| Format | Diagram | 
| PhysicalDescription | Ink and graphite pencil on paper | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| RelatedMaterial | DOI: 10.1098/rspl.1890.0024 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA6349 | Lockyer; Sir; Joseph Norman (1836 - 1920) | 1836 - 1920 |