| RefNo | EC/1881/11 | 
| Previous numbers | Cert XI, 10 | 
| Level | Item | 
| Title | Christie, Sir William Henry Mahoney: certificate of election to the Royal Society | 
| Citation | Inventor of a recording micrometer used with the Greenwich Transit Circle; of a photometer for measuring the brightness & colour of stars; of a new form of solar eye-piece; & of the "half-prism" spectroscope in use at the Royal Observatory Greenwich & elsewhere.  Author of "Elementary Manual of Astronomy" (SPCK series) & of the following papers: - "On a recording micrometer" (Monthly Notices RAS Vol 33); "on the Colour & Brightness of Stars as measured with a new Photometer" (Monthly Notices RAS Vol 34); "on the determination of the Scale of Photographs of the Transit of Venus" (Monthly Notices RAS Vol 36); "on the magnifying Power of the Half Prism, & on the general Theory of the Half-Prism Spectroscope" (Proc RS no 179, 1877); "on a new form of Solar Eye-piece" (Monthly Notices RAS Vol 36) "on the systematic error of Greenwich NP Distances" (Read before the R Ast Socy Jany 1880); together with several other important papers which have appeared in the Monthly Notices of the RAS. -  Distinguished as a Mathematician & Astronomer, attached to Science & anxious to promote its progress. | 
| Proposers | From General Knowledge: I Todhunter From Personal Knowledge: J C Adams; J Challis; G B Airy; William Huggins; Warren De La Rue; E J Stone; Charles Pritchard; J Norman Lockyer; W de W Abney; Wm Lassell; J R Hind; Arthur Schuster; Charles V Walker; Fredk Guthrie | 
| Extent | 1 sheet | 
| AccessStatus | Open | 
| Image |  
  | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA6998 | Christie; Sir; William Henry Mahoney (1845 - 1922) | 1845 - 1922 |