The Report for 1921 of the National Physical Laboratory iStationery
Office, 6s. 6d. net) reveals the variety and high importance of the work that is now being done at Teddington. There is much less commercial testing and far more scientific research than in the early days. The Report gives details of what has been done under the heads of physics, electricity, metrology, engineering, aero-dynamics and metallurgy and in the William –Frew& National Tank for the study of shipbuilding problems. For the benefit of the so-called " practical man," who contemns
research, the executive committee quotes a letter from Sir Henry Fowler, who was Director of Production at the Ministry of Munitions, testifying to the value of the advice given by the late Director of the Laboratory in respect of screw gauges. Through his advice " the country saved many times over the whole cost of the National Physical Laboratory since its inception." One of the innumerable problems which Teddington has had to solve is that of the best method of lighting the National Gallery so as to lessen the reflections' in the glais covering the pictures. It has been found 'hat a projecting cornice, in galleries running north and south, gives much relief.
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