Junior Science Society

Maintenance". Mr. Sedman had with him a large number of models and actual motor-car parts to illustrate his talk. During the evening he demonstrated the process of decarbonisation on a Ford engine, and used a model that he had made to illustrate the production of a spark by the ignition circuit.

On 20th February the Society was visited by two young members of the British Interplanetary Society. Mr. Fry, assisted by Mr. Howitt, delivered a lecture entitled "A Survey of the Universe". Mr. Fry first gave a brief history of astronomy and discussed certain theories of the origin of the universe. He then proceeded to his main topic, which was a survey of the types and formation of galaxies. Finally, he outlined the work of the British Interplanetary Society.

The final meeting of the term was held on 19th March, when two members of the School gave talks. R. G. Bruce spoke first on "The Jet Engine". He described the construction of the jet engine and showed how it was more efficient than the propeller engine at high speeds. C. W. A. Groundwater followed this with a lecture entitled "The Cathode-Ray Oscillograph", which was illustrated by demonstrations. Groundwater outlined his own experiments to determine the ratio between the charge on an electron and its mass, and obtained the waveforms of various musical instruments on an oscillograph.

During the year we have managed to arrange lectures on several of those subjects which were most in demand at the beginning of the year, and we have been lucky to have had five visiting speakers. To them, and to those speakers from inside the School who have contributed to our meetings, we extend our thanks. J.A.F

THE JUNIOR SCIENCE SOCIETY

At the first meeting of the term two films were shown. One, "Powered Flight", showed the history of aviation and the other, "The Rival World", dealt with insect pests and the methods adopted to control them. J. M. D. Kirk spoke at the second meeting on Fishing. His talk was illustrated with some film taken by Poynor during a voyage on a trawler. Mr. Eddington of York Civil Defence gave a lecture at the next meeting on "Civil Defence". He outlined the various dangers from atomic explosions and the organisation which had been set up to deal with them. Many questions were asked by members after the talk. At the final meeting Mr. Craine gave an interesting talk on "Bird Trapping and Ringing". He illustrated this with a large number of colour slides and a film taken during his visit to Fair Isle.