MAGNETIC FORCE. 



641 



<o a> a * 

 « ee fl 



l-H fh 



S3 IS 



4> 

 fc! -a 



g 0) w 



* .2 



4> .a 

 hp ^ 



0) 



ti r2 

 a o 



03 cu 



Q 

 pS5 



1 



Ph 



S 



1 



a 



PH 



a 



0) 

 -a 



S3 45 



-2 

 o 



4> fee 

 'S .5 



4) 

 4> 

 5h 



4> 



ts 



C3 

 O 



0) 



ib 

 s 



© -s 



- I 



.a -a 



'J § 



& 'g 

 o o 



$ ^ 



c° Q 



1| 

 * j 



CD 



o £ 



4> © 



£ 53 



S~i CD 



4) 



a 



ns a 



£ 4) 



81 1 



4) JS 



0) **■ 

 5-1 ""d 



a 



3 

 s 



u -a 



.2 4) 



o 



a J 



a a 



2 S 



a * 



4) ,£3 



4) 



CD 



4> cy 



3 6: 



•> 4) 



43 a 

 a © 



53 



s 



.0 



I 



a "rj 



4) H 

 g O 



oa TJ 



a O 



•r-t t-t 



J3 

 a 



o 



u 



N 



I— I 



m 



<! 



&2 



4) 



Id 

 s 



4) 



-a 

 t-> 



a 

 o 



a 



o 



1 



4> 



CO 



o 



'5 



a 



+ 1 



+ 



+ + + + + + + 



g S3 



S 3 ^ffi fl'ffi J 



M S3 2 «3 



ttf^2 ■5'"' 



- % O 



a, 



5 « 



fa fa 



CO ^ 



fa .a 

 fa 



- 



Face of the Instrument West 



Interval 



of 10 

 Vibrations 



O 1-1 







38.8 

 39.9 

 39.9 



43.1 7 



South V 

 44.5 ) 



39.4 



No. of 

 Vibrations 



© CO 

 eo co 

 i-i 1-1 







150 

 200 

 162 



100 



strum ent 

 124 



150 



Inter- 

 val 



^-tf © 



-CO OS 







9 41.3 

 13 18 



10 37 



7 11 



the In 

 9 11.5 



9 51 



Arcs 



-© © 



0%$ 







86 20 



87 00 

 93 30 



81 10 



Face of 

 97 48 



88 20 



> 



© r* 

 ©' 



si i-l 



© © 



t)< us rf 



-CO CO © © 



ws ' ^ 1-1 3 



mt East 



Interval 

 of 10 

 Vibrations 



37.6 

 39.6 



39.8 



42.6 



42.1 



41.8 



46.3 



44.1 



Os 

 IN 



41.4 



Instrum< 



No. of 



Vibrations 



© © 



r-t r-l 



CO 

 l-H 



CO 

 CO 

 l-H 



© 



l-H 



© 



■"3* 

 1—1 





CO 

 CO 



1— 1 



CO 

 CN 

 l-H 



CO 

 I-l 

 l-H 



of the 



Inter- 

 val 



^ 1— 1 



-X OS 



es 



CM 

 OS 



13 19 



12 26 



m 

 ■<# 



OS 



11 57 



^ 



Os 



CO 



CO 



Face 



Arcs 



^© © 

 © 



76 45 



77 OS 



80 47 



82 25 



83 50 



83 15 



OS LI 



86 55 



h3 



CM 



© >o 



W3 CO 



co co os 



Iffl rH 



OS i-H Ttl 



© r- l-H 



£ 2 



CO <N 



co o 



©^ 



co g 



rH S 

 1-3 



Cs 



fan 



4 N 



CM 2 

 i-H 3 



fa- 



