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XXXII. History of Astronomy for the Year 1806. By 

 Jerome db Lalande. 



[Concluded from p. IL'9.] 



JL HE metre dcs archives of the Icir'islative body and hat of 

 the observatory have been placed by the new comparator oF 

 M. Le Noir at '23" of the ccnti<2;rade ihcnnonicter : they 

 differ only by a 600,0r)0dth part from each other, but we 

 cannot account for this difference : the comparison was 

 made by Messrs. Dclambrc, Prony, BurckharJt, and Bou- 

 vard . 



M. Chevalier, keeper of the library at the Pantheon, who 

 accompanied Mechain into Spain, has re-established the ob- 

 servatory of Pingre with very excellent inslrnments. 



M. Leupold, who has laljoured along with nie in Paris, 

 has undertaken to re-establish the observatory at Bourdcaiix; 

 he is assisted by Messrs. Lescar and Ducum. They have 

 applied to the administration to enable them to proceed with 

 the necessary repairs ; and they propose to procure a quarter 

 of a circle. This establishment will certainly be of great 

 use in a place where there are such a number of seamen. 



The marine department has furnished some works this , 

 year. In the third volume, for 1806, of the Ephemeridcs 

 of Coimbra, there is a table of longitudes made from the 

 triangles of Portugal. The Hxdrographic Board at Madrid 

 has furnished several of them. We there find a memoir 

 upon the rhomboidal reticule, and one upon the use of the 

 hicridian glass, when it has a deviation. We there find 

 Demonstra^ao e ampliagao do Calculo dos Eclipses proposto 

 no primeiro Volume das Ephemerides de C^ivihr-a, 1 S06. 



But this method does not seem to me to have any ad- 

 vantage over the others ; it proceeds upon the tabl-cs of the 

 Ephemerides of Coimbra. 



Elcmens Historiqnes-pratiqries de la Marine, by M. Su- 

 zanne. We there find the calculation of the resistance of 

 forces, with naval tactics and manoeuvres. 



M. Ducum, professor of navigation at Bourdeaux, has 

 published a memoir entitled " New- Method for determining 



the 



