delicate branches of astronomical observation, without intrenching 

 on the regular work of other official observatories. The results have 

 been mostly printed in the ' Memoirs' and 'Monthly Notices of the 

 Royal Astronomical Society,' or in the ' Proceedings of the Royal 

 Society,' to which reference should be made for the details of the 

 separate researches. Of the fifty papers chiefly contributed to these 

 Societies since 1870, it will suffice, here, to give the titles only of a few 

 of the most important : " On the Moon's Photographic Diameter, 

 and on the Applicability of Celestial Photography to accurate Measure- 

 ment "; "On a simple and practicable Method of .measuring the 

 Relative apparent Brightnesses or Magnitudes of the Stars with con- 

 siderable accuracy " ; " On certain Deviations from the Law of Aper- 

 tures in relation to Stellar Photometry, and on the Applicability of a 

 Glass Wedge to the Determination of the Magnitudes of Coloured 

 Stars"; "On the Parallax of 61 Cygni, as obtained by the aid 

 of Photography"; "Photometric Determination of the Relative 

 Brightness of the Brighter Stars North of the Equator " ; " Urano- 

 metria Nova Oxoniensis," containing the relative magnitudes of 2,784 

 stars, determined by the wedge-photometer ; " On the Relative 

 Proper Motions of 40 Stars in the Pleiades " ; " On the Capacities, 

 in respect of Light and Photographic Action, of two Silver on Glass 

 Mirrors of different Focal Lengths " ; " Determination of the Parallax 

 of 30 Stars, chiefly of the Second Magnitude, by the Photographic 

 Method," &c. Professor Pritchard also undertook a share of the 

 observations for the new International Photographic Chart of the 

 Heavens. The special zone of six degrees between 31 and 25 N. 

 declination has been allotted to the Oxford University Observatory, 

 and, at the time of his death, some progress in the work had been 

 made. 



In addition to the astronomical researches carried on under Pro- 

 fessor Pritchard's direction, some most excellent papers and treatises 

 of a popular nature were written by him from time to time. !Not the 

 least, interesting are the three eloges contributed to the ' Annual 

 Reports of the Royal Astronomical Society 'for 1865, 1866, and 1872, 

 on -the deaths of F. G. W. Struve, Director of the Pulkowa Observa- 

 tory, Sir W. Rowan Hamilton, and Sir John F. W. Herschel. He 

 wrote a series of popular articles on astronomy for ' Good Words,' and 

 was the author of " The Star of the Magi " in the ' Biblical Dictionary,' 

 and of several articles in the ninth edition of the ' Encyclopedia 

 Britannica.' He also collected some of his miscellaneous writings 

 into a volume entitled ' Occasional Thoughts of an Astronomer on 

 Nature and Revelation.' 



His Savilian Lectures, both on theoretical and practical astronomy, 

 were usually well attended, especially by intending candidates for 

 mathematical honours. Owing to constant and increasing applica- 



