236 



CONTENTS. 



PAGE 



The Site at Waimea ...... 237 



The Transit Chronometers --..... 



The Transit Instrument - - - - . 



Value of one revolution of the Transit Micrometer Screw ... 238 



Equatorial Intervals of the Wires - 



The Level Error - 



Error of Collimation ... 229 



Error of Azimuth - - 



Transits observed at Waimea - 



Latitude of Waimea - - - 240 



Longitude of Waimea - - 



Report of Mr. R. Johnson on his Observation of the Ingress of Venus, 1874, 



December 8 - - - - 241 



Mr. R. Dunn's Observation of the same - - 243 



Final Equation for Waimea - - - 244 



Observations in Tabular Arrangement : 



Table I. Transit Instrument, Level Errors - - 245 



II. Collimation Errors - 246 



III. Azimuth Errors - 



IV. Transits observed at Waimea - . 247 



V. Comparisons of the Stationary Chronometers - - 252 



VI. to VIII. Errors and Rates of the Chronometers ... 253 



Plate VII. Plan of Waimea - - - to face 237 



