AT THE ROYAL OBSERVATORY, CAPE OF GOOD HOPE. 



483 



One revolution of micrometer = 26". 06925. 

 After tenth measure turned the position circle verniers 180" to eliminate the coincidence of the wires. 



One revolution of micrometer 98". 06925. 

 After tenth nipflmrp rorrrapit the position firrlf vernier*. 



