Soc. Edin. 



Vol. XL 



agnetic Shielding in Hollow Iron Cylinders. — plate 4. 



SEE* TABLES XV ir XVI 



XXV 



F I G XXV XL 



S Ac eld B. 



10 



is 



rcc. 



/ 





F\ G XXJII 



Shield 3. 

 tc corvaltCtons. 



Jl ^\\ 



t 



He. 





Shield, /7. re condi C cores. 



