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CONTENTS. 
Method of determining the Coefficient by the comparisons of the usual observations, 
Conclusion that the Variations of the Horizontal Component are independent of 
the temperature of the soil and atmosphere, ...++++++srersseess+srrsceerseeeeerenerss 
Determinations of the Coefficient, --++++++-++++++ Ro REDSRe SUG MAREN Seancataesnnsicasievvere cas 
Error of the determinations by hot and cold water experiments,--+---++++++++++++++++++ 
Temperature Coefficient of the Balance Magnet by hot-water experiments, ---------- 
Coefficient Constant for High and Low Temperatures,-----+----+++-1++sereeeeeenrerssrees 
Conclusion that the Variations of the Vertical Component are independent of the 
temperature of the soil and atmosphere, :-----+ we nacnen ences csesesensseesssscccs 
Determinations of the Coefficient by comparisons of the usual observations,:----.--- 
Inclinometer— 
Description of the Instrument, +..+++--+++++e++eerereteerees Seeetetedadceatetsaspadsieenacerst xo 
Observations for the determination of Instrumental Errors, «--+++++++1++++++eees++e0000+ 
Method of determining the Absolute Vertical Component and Inclination (footnote) 
Barometer— 
Description of the Instrument,:----- eecerscencccenenssoccnceceverecsessreresessersenscssessecces 
Indirect Comparisons with the Standard of the Royal Society of London, 
Corrections applied to the Observations,---+++++++++sscreessereserseesesrcteteeeeeeeseeecs: 
Thermometers— 
Description and Position of the Dry and Wet Bulb Thermometers, ------------.------ 
Scale Errors, ++++++:seecc+-seeeereraveeesenerees es eeees Meenas contnetee ee ceareis Decinnacoco bocoREcone 
Maximum and Minimum Thermometers, eae NAME onsente Caicaracateripneccissiicesscnecctre 
Actinometer— 
Description of the Instrument, --+-+----+-ssserescenereceesscncnsverseoseneenssgcnesesess scores 
Miothod! of Observations <xeancnnecacants soc tneke tet tee rreeteee nrc ese TSE orem ccs cos vec 
Effect of Plate-Glass Cover,.-.-+++++++s0:ssteseeree see seecee ener se reeeeeeeersceeeeesene eee rcctes 
Rain-Gauges— 
Description and Positions of the Gauges, --++-+++1::0+eeescssss seseeeeceeeeeeeeee ee eeeees 
Vanes and Anemometer— 
Position of the Vanes, 
Description of the Anemometer, --++-:+:++eeesseretesseeeeeescnsr een eeeneceeeenererscceesesenes 
Mode of Observation, -«--+-++:++s:+seeseeeeeecececeeeeeeceeeeceeeetcseee tees setae enscreeseee ens 
State of the Sky— 
Mode of estimating the Extent of Sky Clouded, and the Motions of Clouds, ---..--- 
Symbols used for the amount of Sunshine and Rain, -+-+++++++++eeseeseee sees eee eeeeee 
Clock, &e.— 
State of the Clock in the Magnetic Observatory, &€., «+++++++++seeeseeee eee eeeeee eee eeeees 
Description of the Tables of the Observations, +++++++++++01eeeteeretreeeeeeeneeeeeccee cna neeereeeee ees 
Reference to the Abstracts of Results,:+-..++-+++1++esesteeesesesesesneeeeeseaseeceseesesrascrsssesaeees 
Account of the Curves projected by the Anastatic Process,:+++-+++++sceeree eer eeeeenen ere ceercneesces 
AppENDUM— 
Results of Observations for the Absolute Horizontal Intensity, made with large bars, 
Observations for Induction and Temperature Coefficients of small bars, --.---.--.--- 
Results of Observations for the Absolute Horizontal Intensity, made with small bars, 
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