Objective Experiments in the Sound Resistance of Actual Building Elements. Discussion on Paper by Mr

Dr. OSCAR FABER, commenting on his criticisms in the paper of concrete floors, said that they were by no means intended to be a general condemnation of concrete floors; they had reference only to the use of reinforced concrete for certain specific purposes. He disclaimed any intention to condemn concrete floors generally.

THE Cement Gun Apparatus had a rather curious origin. It was invented in America between 25 and 30 years ago, as the result of some experiments made by Mr. Carl Akeley, a big-game hunter, in forming the mounts for his trophies. The carcases were formed by spraying plaster of paris on to an expanded metal frame of the required shape. T. Whitley Moran

This month's letters discuss foundations in shrinkable ground and highlight a survey on structural optimisation in practice.