MAGNETIC SHIELDING IN HOLLOW IRON CYLINDERS. 



Table XX. — Shielding Ratios — Transverse and Longitudinal Fields H, = 209 C.G-.S. 



681 





TL Conditions. 



TLL Conditions. 



LT Conditions. 



LTT Conditions. 



H, 



(H)„ 

 1-51 



9 



H 



(H) w 



</ 



H, 



(H), 



g 



H, 



(H)„, 



9 









13-8 







1-51 



13-8 







1-44 



14-5 





1-50 



13-9 



a 



3-1 



•85 



24-8 



3-1 



•535 



391 



3-3 



133 



15-7 





1-58 



132 



> 



5-0 



•688 



30-4 



5-3 



•381 



55-0 



7-7 



1-26 



16-6 



a 



1-66 



12-6 



X 



X 



7-1 



•59 



35-4 



7-7 



•365 



57-3 



9-2 



1-30 



16-1 



'£ 



1-71 



12-2 



87 



•55 



38-0 



15-4 



•445 



47 



151 



1-43 



14-6 



c 



1-72 



121 





135 



•575 



364 



19-3 



•543 



38-5 



2U-2 



1-55 



13-5 



o 



1 





9 



m 



18-0 



•623 



33-5 



242 



•632 



33-1 



23-0 



1-68 



12-4 



H 



2-03 



103 



Ul 



23-7 



•737 



28-4 



31-5 



•923 



22-7 



28-4 



1-87 



11-2 



i-l 



2-13 



9-8 



. 



30-0 



•987 



2T2 



36-6 



1-52 



137 



374 



2-57 



8-13 



H 



310 



6-7 



< 



36-5 



1-51 



13-8 



453 



2-42 



8-6 



46-2 



362 



5-78 





4-03 



5-2 



2 



45-6 



2-47 



8-5 



523 



314 



6-7 



533 



4-3 



4-86 





4-64 



4-5 



2 



53-1 



322 



6-5 



59-5 



372 



5-6 



601 



4-9 



4-23 



a 



5 2 



4-0 



W 



60-6 



3-84 



5-5 



























2-75 



7 6 



















M 



2 - 2 



2-14 



9-8 



2-7 



1-75 



12 



2-7 



2-56 



8-16 





2-78 



7-6 



« 



3-4 



1-98 



10-5 



5-1 



115 



18-4 



53 



2-40 



8-7 



a 



2-49 



8-4? 



* 

 X 



7-8 



1-47 



142 



7-8 



102 



20-5 



7-8 



2-37 



8-8 



'-+■3 



2-75 



7-6 



60 



9-6 



1-385 



15-1 



9-5 



•973 



21-5 



15-7 



2-35 



8-9 



a 



3-0 



7 



en 



15-7 



1-195 



175 



15-6 



•816 



25-6 



25-6 



2-60 



8-0 



o 



33 



6-3 



ID 



20-5 



1-19 



17-5 



20-4 



•89 



23-5 



36-6 



316 



6-6 



E-i 



373 



5-6 





25-6 



1-25 



16-7 



256 



1-01 



20-7 



59-5 



4-63 



4-5 



J 



511 



4-1 



ffl 



31-2 



1-54 



13-6 



310 



1-24 



16-9 















73 



366 



1-7 



12-3 



364 



1-43 



14-7 















s> 



45-3 



2-21 



9-4 



44-9 



2-03 



10-3 









9 







43 

 GO 



52-4 

 59-5 



2-7 

 2-38 



7-7 

 6-2 



519 



58-5 



2-49 

 3-05 



8-4 

 6-8 









«S 







Table XXI. — Shielding Ratios — Transverse and Longitudinal Fields. 



TL Conditions H, = 33-6. 



TL Conditions H ( = 64-25 C.G.S. 



TL Conditions H, = 20"9 C.G.S. 





H, 



(H)„ 



9 





H, 



(H),„ 



9 





H, 



(H)„, 



9 



Shield A. See fig. xxxviii. 







3-2 



4-9 



7-1 



8-7 



13-7 



17-6 



212 



25-3 



32-6 



39-6 



45-0 



50-0 



1-78 



1-13 

 •945 

 •85 

 •85 

 •87 

 •96 



112 



1-28 



1-94 



3-0 



3-9 



47 



18-9 

 29-6 

 35-5 

 39-5 

 39-5 

 38-6 

 35-0 

 30-0 

 26-2 

 173 

 11-2 

 8-6 

 7-1 



> 



X 

 X 

 X 



6C 



ca 



<i 



"2 



IS 

 m 







2-1 

 4-7 

 9-0 

 13-3 

 16-4 

 21-3 

 26-2 

 30-1 

 34-2 



3-45 

 2-54 

 2-08 

 1-94 

 2-08 

 2-24 

 2-56 

 3-20 

 4-10 

 5-25 



18-6 

 25 3 

 30-9 

 33-2 

 30-9 

 28-7 

 25-0 

 20-1 

 15-7 

 12-2 



Shield B demagnetised by 



circular field. See fig. xxxix. 



broken line curve. 







2-7 



5 



7-7 



9-2 



15-0 



19-4 



23-5 



30-0 



36-5 



45-1 



52-1 



59-1 



2-5 



1-82 



1-49 



1-27 



1-16 



1-00 



1-05 



1-18 



1-36 



1-65 



212 



2-66 



3-24 



8-4 



11-5 



14-0 



16-5 



18-0 



21-0 



20 



17-7 



15-4 



12-7 



9-9 



7-9 



6-5 



