of declination, for any chosen hour of observation, is indicated on 

 the vertical circle. If the sun's declination is north, depress the 

 transit telescope; if south, elevate it. Reference to the diagram on 

 p. 160 will suggest the reason for this. 



2nd step. With the main telescope clamped in the 

 position, level the solar telescope by use of rlamp ami 



tangent. This brings the solar back into the horizon and forms an 

 angle between the tuo telescopes equal to the sun's deilinat: 

 shown in the engra\ i fhe ai u axis 



