THE report for the year 1919 gives evidence that the Board continues to discharge useful work. During the year there was a danger that supplies of casein and glue would fall short, and that aeroplane manufacture would suffer thereby. The Board came to an arrangement with the Air Group of the Ministry of Munitions, and carried out a research into the nature, functions, and manufacture of adhesives. This resulted in the discovery of two new adhesives, one possessing very remarkable properties, and the other prepared from a waste product of which there was a large supply in the country throughout the war. In addition to this, Dr. Schryver and his colleagues, devised improvements in the manufacture of casein, which effect a considerable saving in material and an improvement in its quality.