83 



II. " Description of the Observatory of the Collegio Romano at 

 Rome." By P. A. SECCHI. Communicated by GEORGE 

 RENNIE, Esq., F.R.S. 



Details are given of the construction of the different parts of the 

 building, the arrangement of the instruments, &c., which, for the 

 most part, could be rendered intelligible only with the aid of the 

 plans and drawings with which the description is illustrated. 





