MAGNETIC OBSERVATIONS. 



93 



Coefficient of torsion. 



Tors, circle. 





Scale. 



Die 



erences. 









111° 



301.6 and 295.2 





Observed time of 300 vib'ns, I035M3 







2.6 



Time of one vibration, 3.4504 



267 



299 303 



4,5 



Correction for rate, —0.0002 









87 



300 293 





T 3.4502 







1.4 



and wlien corrected for torsion and re- 



177 



301 294.8 







ferred to temp. 85°, lyT' = 1.07597 



Mean (of 4) . . . 



2.13 = 



2'.15 



Experiments op Vibration. *Set 2, with inertia ring. 



No. of vibrations. 



Time. 



Temperature. 



Extreme scale readings. 



150 vib'ns at 850 







4" 09™ 22^7 



86° Fah. 



356 and 246 





20 



11 36.0 









40 



13 49.3 









60 



16 03.5 









80 



18 16.6 









100 



20 30.8 









150 



26 04.6 







16" 4 P. 9 



170 



28 17.0 







41.0 



190 



30 31.8 







42.5 



210 



32 45.5 







42.0 



230 



34 59.4 







42.8 



250 





37 12.7 





84.0 



332.2 and 268 



41.9 



Mean 



16 42.02 



Coefficient of torsion. 



Tors, circle. 



Scale. 



DiflFerenoes. 



177° 



298.2 and 302.5 



3.6 



• 267 



303.8 304 



5.7 



87 



293.5 303 



1.8 



177 



301.0 299 





Observed time of 150 vib'ns, 

 Time of one vibration, 

 Correction for rate. 



1002^02 



6.6801 



—0.0004 



i; 6.6797 



and when corrected for torsion, 



Z(7T/ = 1.64975 



Mean (i). 



2.8 =2'.83 



Experiments of Vibration. 



No. of vibrations. 





Time. 



Temperature 







4" 



47m 



07^3 



830 



20 





48 



16.1 





40 





49 



25.3 





60 





50 



34.7 





80 





51 



43.7 





100 





52 



52.6 





200 





58 



38.5 





220 





59 



47.6 





240 



5 



00 



56.6 





26 





2 



05.5 





280 





3 



14,7 





300 





4 



23,9 



84 



Sets. 

 Extreme scale readings. 

 252 and 35b 



324 and 280.6 



Mean 



Observed time of 200 vibrations 

 Time of one vibration 

 Correction for rate . 



T 



And when corrected for torsion and referred to 85° Fah,, 



By set 1 we have ..,,,.... 



Mean ..... 



200 vib'ns at 830.5. 



3 P. 2 

 31,5 

 31.3 

 30.8 

 31.0 

 31.3 





11 31.18 





69P.18 





3.4559 





—0.0002 





8.4.557 



IgT- 



= 1.07737 



IgT^ 



= 1.07597 



1.07667 



