CONTENTS. 



y/if Trmperature I'officiintg of thf Deflecting, Balance, ami Btfilar MagntU — 



Tt'Diperature Coefficient of the Detiectioii Magnet, xlv 



Coefficient Constant for Iligli and Low Temperatures, xhn 



Temperature Coefficient of the Bifilar Magnet hy hot-water experiments, xlvi 



Coefficient Constant for Higli and Low Temperatures, xlvi 



Metliod of determining the Coefficient by tlic c()m])arisons of (be usual observations, xlvii 

 Conclusion tbat the Variations of the Horizontal Component arc independent of 



the temperature of the soil and atmosphere. xlviii 



Determinations of the Coefficient, xlviii 



Error of the dctenninations by hot and cold water experiments, xlix 



TemiKTature Coefficient of the Balance Magnet by hot-water experiments, xlix 



Coefficient Constant for Jligli and Low Temperatures, xlix 



Conclusion that the Variations of the Vertical Component are indeix;ndent of the 



temperature of the soil and atmo>:phere, I 



Determinations of the Coefficient by comparisons of the usual observations, li 



JiurUnoiHrtfr — 



Description of the Instrument, lii 



Insufficiency of the Observations, liii 



Improved method of deti'rmining the Absolute Vertical Compouent and Inclination, liii 



iSaromt^ti-r — 



Description of the Instrument, liv 



Indirect Comparisons with the Standard of the Royal Society of London, liv 



Corrections applied to the Observations, Iv 



Thfnnonuttrg — 



Description and Position of the Dry and Wet Bulb Theruiomet<;rs, Iv 



Scale Errors, Jvii 



Maximum and Minimum Thermometers, Iviii 



Actin&ttietei — 



Descri])tion of the first Instrument, Iviii 



Description of (be srcimd Instrument, lix 



Rahi-Gangu — 



Description and Positions of the Gauges, Ix 



Vai\4i» and Antmomcter.^ 



Position of the Vanes, \x 



Description of the Anemometer, Ixi 



Mode of Observation, Ixii 



ataU uf tlu. Sky— 



Mode of estimating the Extent of Sky Clouded, and the Motions of Clouds, Ixii 



Symbols used for the ajnount of Sunshine and Rain, Ixiii 



flock— 



State of the Clock in the Magnetic Observatory, Ixiij 



DrMriptioH uftlu Tahiti) of tke Ohurvatiunt, Ixiii 



lirfctaice to «/i« Abstracts of liamltt, Ixvi 



Accownt of the Cunei projected by tlu: Anaitatic Procen, Ixvi 



