&c.;
  Cumberland, &c.; Ireland; Kent; S. Wales;
  Luddington and Yorkshire; Border of Scotland;
  S. Wales; Cumberland and Yorkshire; South of Ireland;
  Ireland; France; Cornwall; Germany; Petersburg, &c.;
  Ireland; Shetland; Scotland;
  Sweden; Madeira; Cumberland; Cumberland; Oban, &c.; Italy and
  Sicily; West Highlands; Switzerland; Central France; Spain
  (eclipse); Cumberland; West Highlands;
  West Highlands; Cumberland; Norway; Cumberland; Switzerland;
  Cumberland; Cumberland; Cumberland; Scotland; Scotland; N.
  of Scotland; Ireland; Scotland, &c.;
  Cumberland; Cumberland;
  Cumberland; Cumberland; S. Wales; Cumberland 358; Cumberland
Julius Caesar, landing of
Jupiter (see Planets)
Keeling
Kennedy
King, Joshua
Kingstown
Knight, publisher
Knighthood, offers of
Lagarde
Laing
Landman, Engineer
Langton
Lardner, Dr
Lassell, and Lassell’s telescope
Latitude determinations
Lax, Prof. 
Lectures: 
  College
  Professorial
  Miscellaneous
Lefevre, J.G.S. 
Leitch, Dr
Le Verrier
Lewis, H.
Lewis, Sir G.C. 
Lightfoot, Rev. Dr
Lighthouses
Lightning
Lillingstone
Lindsay, Lord
Listing, Prof. 
Liverpool Observatory
Livingstone, Dr
Lloyd, Dr
Lloyd, Prof. 
Lockyer
Lodge
London University
London, Freedom of the City
Long vacations, with pupils
Longitude determinations
Longitude, Board of (see Board of Longitude)
Lowe, Chancellor of the Exchequer
Lubbock, Sir John
Lucas (computer)
Lucasian Professorship (see Professorships)
Lunar Reductions
Lunar Theory and Tables (see also Numerical Lunar Theory)
Lyndhurst, Lord
Lyons, Sir E.
Macaulay, T.B. 
Macdonnell, Dr
Maclean, of Loch Buy
Maclear, Astronomer
Madras Observatory 101
Magnetic Observatory and Magnetism
  (see also Meteorology, Compass corrections, and Earth currents)
Main, Robert
Maine Boundary (see Canada)
Maiden, Prof. 
Malkin
Malta
Man-Engines (see Mines)
Manuscripts (see Papers)
Mars (see Planets)
Marshman, pupil
Marth, A.
Martin, Trin.  Coll. 
Maskelyne, astronomer
Mason
Mathematical Investigations (see also Appendix “Printed Papers”)
Mathematical Tracts
Mathematical subjects in
Maudslays and Field
May, Ransomes and May
Medals
Melbourne University
Melville, Lord
Mercury (see Planets)
Merivale, Dr
Meteorology
Meteors
Middleton, Sir W.
Milaud
Military researches
Miller, Prof. 
Mines
Minto, Lord
Mitchell, astronomer
Mitchell Miss
Molesworth, Sir W.
Monteagle, Lord
Monument in Playford church
Moon: 
  Observations of
  Theory and Tables of (see Lunar Theory and Tables)
  Reductions of Observations of (see Lunar Reductions)
  Mass of
Morpeth, Lord
Morton, Pierce, pupil