226 



HISTOEY OF ASTKONOMY. 



is divided into two rooms, in one of which are the mural 

 circle and the meridian circle, and in the other are the 

 chronometers. The wing on the south side is 21 by 40 



feet, in two apartments. In the first apartment is the 

 transit in the prime vertical, and in the second apartment 

 is the new refraction circle. In each of these wings is 



