146 The Rev. Dr. Robinson on the Difference of Longitude, Sfc. 



that is scarcely an objection, if it be so near the observatory that time can be 

 transmitted certainly by powder signals, as they can be multiplied to any 

 , extent. 



The junction of Oxford with Greenwich is a matter of no difficulty. 



T. R. ROBINSON. 

 Armagh Obsebvatoby. 



