To conclude, although his moral character is not altogether irre proachable, he was always ready to patronise time needy votary of science, and he would advocate the cause of a friend at the risk of his own personal safety.
The following is a list of his principal publications :— Navigation, its History, Theory, and Practice,' 4to, Paris, 1793; ' The Physician's Almnuack,' Paris, 1800; 'The Geographical and Chronological Almauack,' 1799-50 ; ' Astronomy,' let edition, 2 vole. 4to, 1764; 2nd ed., 4 vols. 4to, 1771.81 ; 3rd ed., 8 vols. 4to, 1792; the same work abridged, Amsterdam, 1774; 8vo, Paris, 1775-95 ; ' Astronomy for Ladies,' last edition, 1824; 'Astronomical Biography,' 4to, 1803; ' Treatise on Canals in general, and in particular of the Canal of Languedoc,' Paris, fol., 1778 ; ' Transit of Venus,' 4to, 1704; ' Description of a Machine for dividing Mathematical Instruments, translated from the English of Itamsden,' 1790; 'A Discourse tending to prove " That the spirit of justice constitutes the glory and security of empires," ' to which the Academy of Marseille awarded their prize, 1757 ; 'Dissertation on Capillary Attraction,' 1770 ; 'Ephemeris of the Heavens,' 1775.1800; Exposition of Astronomical Calcula tions,' 1762; 'French Celestial History,' 1801 ; 'Letter to Cassini on the subject, of Saturn's Ring,' ]773; 'Memoir on the Interior of Africa,' 1795 ; ' Reflections upon Comets which may approach the Earth,' 1773; 'Astronomical Tables for the .Meridian of l'aris,' 1770;
'Portable Logarithms,' 1S02; Treatise on the Tides,' 17S1; 'Journey to Most Blanc, 1790.
The whole of the papers of Lalande in the `Memoirs of the Institute' were contributed between the years 1751 and 1806. Of these the most important are ' On the Parallax of the Moon, and its Distance from the Earth,' I752-53.56-S7 ; ' On Secular Equations, and on the Mean Motions of the Sun, Moon, Saturn, Jupiter, and Mars,' 1757 ; 'On the Theory of Mercury,' 1760-67-68.86; ' On the Solar Spots and Rotation, 1776-78; 'On Ilerschel's Planet,' 1779-87; 'On the Length of the Solar Year,' 1782; ' Observations of 8000 Northern Stare,' 1789.90. Ile likewise superintended an edition of the 'Astronomy' of Lacaille, Bougucr's Navigation; Flatusteed'a ' Celestial Atlas,' Fontenelle's ' Plurality of Worlds,' and in conjunction with Laplace and others he edited the latter volumes of Montucht's ' History- of the Mathematics.' (Deltunbre, Eiogc de Lalande, in the 'Memoirs of the Institute,' 1807, and notice of his life in the ' Biog. Univers.; ' Hutton, Mathe matical Dictionary ; Querard, Dictionnaire Bibiiographiqiw.)