Mallik & Da> 



Phil. Mag. Ser. 6, Yol. 33, PL IV. 

 11. 



in. 



IV 



1 & 2.— With magnetic field at same pressure 

 as at 3. 

 3. — Without magnetic field. 



1. — Pressure slightly greater than "001 mm. 

 2. — Pressure slightly greater than "001 mm 

 3. — Pressure about 'GUI mm. 



