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fidered was the arrangement of the building, and the moft 

 commodious difpofition of the inftruments, fo as to give to 

 each a fituation juftly fuited to the particular obfervations 

 to be made. Accordingly, I devifed the annexed plan, which 

 the College was pleafed to adopt, and they committed the 

 fuperintendence to me in the arrangement and execution of 

 fuch parts as demanded particular nicety and attention. 



The defcription of this Obfervatory, accompanied with a 

 ground plan and elevation, I now lay before the Academy. 



AltTHOugh I have fpared neither ftudy nor afliduous atten- 

 tion on this building and apparatus, I am not fo vain as to 

 fuppofe it perfed ; it may hereafter betray to me imperfedions 

 which perhaps even now are anticipated by better judges. This 

 time alone can determine : and the public at large, and this Aca- 

 demy in particular, may depend upon the moft faithful detail of 

 the advantages or imperfedions of every thing which is original 

 either in the building or apparatus. 



' With 'refped to the ftrudure, I need not, to Aftronomers, 

 apologize for want of ornament and architedural elegance in a 

 building which, to anfwer its defign fully, muft probably rejed 

 both ; perfed ftability and convenient difpofition of the inftru- 

 ments form here the archited's great objed ; and a vain affec- 

 tation of tafte may militate againft thefe effential qualities. 



for meafuring meridian altitudes. — An equatorial inftrument, the circles being five 

 feet diameter. — And an achromatic telefcope, mounted on a polar axis, and carried 

 by an helioftatic movement, for 'occafional obfervations. 



In 



