With the coming of the spring the dormant life springs forth; similarly the life that India conserves, by inheritance, culture and temperament, was only latent and was again ready to spring forth into the blossom and fruit of knowledge. Although science was neither of the East nor of the West, but international in its universality, certain aspect of it gained richness of colour by reason of their place of origin. India, perhaps through its habit of synthesis, was apt to realise instinctively the idea of unity and to see in the phenomenal world an universe instead of a multiverse. It was this tendency, the lecturer thought, which had led Indian physicist, like himself, when studying the effect of forces on matter to find boundary lines vanishing, and to see points of contact emerge between the realms of the living and non-living. In taking up the subject of the evening's discourse on electric radiation of Hertzian waves, the lecturer explained the constitution of the apparatus which he had devised for an exhaustive study of the properties of electric waves. His apparatus permitted experiments with the electric rays to be carried on with as much certainty as experiments with ordinary light, and he demonstrated the identity of electric radiation and light. The electric rays are reflected from plane and curved mirrors in the same way and subject to the same laws. Electric rays, like rays of light are refracted. Like race of light too, electric waves can be selectively stopped by various substances, which are "electrically" coloured. Water which is a conductor of electricity stops the electric ray; where as liquid air which is a non-conductor is quite transparent to the rays. Finally Professor Bose explained his discovery of Polarisation of these rays by various crystals. Tourmaline, which was a good polariser for ordinary light, was not so effective. The lecturer discovered that the crystal Nemalite possessed the power of polarising the electric rays in the most perfect manner. Professor Bose also explained how the internal constitution of an opaque mass was revealed by the help of light which was itself invisible.