The dry catalogue of tables and works becomes curious and interesting when we consider them all as the production of one man, who was also actively engaged either on the great Survey or in continual observation. But the list is yet far from complete. The Histories of Astronomy (_Ancienne_, _Moyenne_, _Moderne_, _du dix-huitième Siècle_), comprised in six volumes 4to., appeared between 1817 and 1821, with the exception of the last, which was published in 1827, after the author’s death. His large work on astronomy, in three 4to. volumes, came out in 1814, and the ‘Base du Systême Métrique,’ a detailed account of the operations of the Survey, in four volumes 4to. (of which the first three are the work of Delambre), appeared at different times between 1806 and 1810. He had previously (in 1799 if we recollect rightly) published a shorter description of the methods employed. His decimal tables of Logarithms appeared in 1801, and his Report on the Progress of all the Sciences since 1789 was presented to the Emperor Napoleon in 1808, and published in 1810. We have still to add the numerous memoirs which he contributed to the ‘Connaissance des Tems,’ the ‘Memoirs of the Institute,’ and other periodicals, to the list of Delambre’s labours; a list which shows that he possessed a degree of energy rarely surpassed, and a quantity of reading, on the subject of astronomy at least, certainly never equalled. But though it is only justice to the memory of Delambre to insist upon the amazing _quantity_ of work which he performed, all of the first order of utility, in which he appears to us to stand altogether without a rival in the history of science, we have yet to point out how much of that work was of a more laborious character than is usually necessary to produce the same number of pages. We need not dwell on the planetary tables, &c., or on the ‘Base du Systême Métrique,’ almost every page of which is a separate record of toil and patience. The History of Astronomy is a work of a peculiar kind. It is not merely a digest of ideas which the author had acquired from the perusal of the writings of others, but an actual abstract of every work which has exercised the least influence on the progress of the science, whether Greek, Arabian, or modern European. This task by itself would have been abundantly sufficient to secure to its author the reputation of a long life well spent; for he had to wade through the writings of every age and country, and in particular to acquire a knowledge of the mathematical styles of different times, which are sufficiently distinct to render them, we might almost say, sciences of different species. The student of astronomical history is thus with very little trouble put in possession of all the records of the only science whose history is a part of itself, and must be studied with it. If the author sometimes appears prejudiced or hasty in his conclusions, it must be recollected that