• The determination of ancient dates from astronomical data 

  Royds, T; Sitaramaiya, S (Astronomical Society of India, 1912-12)
• The different character of spectrum lines belonging to the same series 

  Royds, T (IOP Publishing, 1915-03)
• The cause of the so-called pole-effect in the electric arc 

  Royds, T (IOP Publishing, 1917-03)
• Das reflexionsvermogen schwarzer Flachen 

  Royds, T (1910)
• Distribution in latitude of the absorption markings in Hα spectroheliograms 

  Royds, T (Royal Astronomical Society, 1912-12)
• The absorption markings in Hα spectroheliograms 

  Royds, T (Royal Astronomical Society, 1911-06)
• The apparent tripling of certain lines in arc spectra 

  Royds, T (The Royal Society, 1925-02)
• On some spectrographic measures of the solar rotation, made at the Kodaikanal observatory 

  Evershed, John; Royds, T (The Royal Society, 1913-06)
• A progressive change in the inclination of hydrogen dark markings to the meridian of the Sun 

  Royds, T; Salaruddin, M (Government Observatory, Madras, 1937-02-11)
• Summary of prominence observations for the second half of the year 1935 

  Royds, T (Government Observatory, Madras, 1936-12-12)
• Photometric study of the lines of hydrogen and of calcium in the fraunhofer spectrum at different points of the Sun's disc 

  Royds, T; Narayan, A. L (Government Observatory, Madras, 1936-11-25)
• Oxygen in the Sun's chromosphere 

  Royds, T (Government Observatory, Madras, 1935-08-29)
• Summary of prominence observations for the second half of the year 1934 

  Royds, T (Government Observatory, Madras, 1935-08-09)
• Summary of prominence observations for the first half of the year 1934 

  Royds, T (Government Observatory, Madras, 1935-03-30)
• Summary of prominence observations for the second half of the year 1933 

  Royds, T (Government Observatory, Madras, 1935-01-28)
• Summary of prominence observations for the first half of the year 1933 

  Royds, T (Government Observatory, Madras, 1934-01-20)
• Summary of prominence observations for the second half of the year 1932 

  Royds, T (Government Observatory, Madras, 1933-09-13)
• Summary of prominence observations for the first half of the year 1932 

  Royds, T (Government Observatory, Madras, 1933-02-25)
• Prominences and radiation pressure 

  Royds, T (Government Observatory, Madras, 1932-03-21)
• Summary of prominence observations for the first half of the year 1931 

  Royds, T (Government Observatory, Madras, 1932-01-27)

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