212 



CONTENTS. 



PAGE 



Establishment at Kailua -- - --213 



The Transit Clock ..... - 



The Transit Instrument ... 



Equatorial Intervals of the Wires ...-.- 214 

 The Level Error - 



Error of Collimation - -- - 215 



Azimuth Error -------- 



The Meridian Mark - - - - - - - 



Transits observed at Kailua - - - - - -216 



Errors and Bates of the Transit Clock - - 217 



Longitude of Kailua - - - - - - - -218 



Latitude of Kailua - - 219 



Professor G-. Forbes' Report of his Observations during the Ingress of Venus, 



1874, December 8 



Equations resulting therefrom ...... 224 



Observations in Tabular Arrangement : 



Table I. Transit Instrument Level Error- - - - 225 



II. Azimuth Error - 227 



III. Observations of the Meridian Mark .... 229 



IV. Transits of Stars and of the Mooii - - 230 



V. Adopted Errors and Rates of the Transit Clock - - 234 



Plate VI. Plan of Kailua - - - - - to face 213 



