Lecturing on 'Whispering Galleries' at the annual science convention at Calcutta on November' 25, Professor Raman said he had recently discovered that there was a remarkable whispering gallery" above the public rotunda in the Calcutta General Post Office. Unfortunately the place was very noisy during the day, but a visitor who got into the gallery beneath the dome of the General Post Office in the early morning or late in the evening when the hun of traffic had died away,. would find it easy to converse with an assistant across the dome (57 feet off) in the gentiest of whispers. The effect he ascribed to the smooth circular wall of the gallery some 15 fect high which goes right round the dome at the level of the clock face. At the time the Victoria Memorial was under construction the architects discovered that the place between the inner and outer domes showed remarkable acoustical properties. Prof. Raman stated that he had ite cently visited the Memorial and discovered that there were in reality two "whispering galleries" in the building. The first gallery was beneath the inner dome in the circular pathway bounded by- a marble railing some 90 feet from the floor at the highest point of Queen's Hall. It was passible to carry on conversation in gentle whispers between any two pointe in this gallery. The second "gallery" was in the space between the two domes.
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