PLATES. 



I. Illustrative of Mr. T. K. Chinmayanus Paper on the Flow 

 of Energy in the Electromagnetic Field surrounding a 

 Perfectly Reflecting Cylinder. 

 II. Illustrative of Mr. K. S. Mitra's Paper on Sommerfeld's 

 Treatment of the Problem of Diffraction by a Semi-infinite 

 Screen. 

 Ill, & IV. Illustrative of Prof. S. Banerji's Paper on the Radiation 

 of Light from the Boundaries of Diffracting Apertures. 

 V. & VI. Illustrative of Prof. Barton and Miss Browning's Paper 

 on Mechanical u Resonators " under Double Forcing. 



