nting the wall) so as to shut off such an extent that about ninety per cent of the dis- which is intended to demonstrate his method in a the sound. Various screens were tried, and one which turbances are suppressed. He divides the stage into more striking manner. A small cabin is used which is seen… … Referring to the diagram, we draw a line from point ties of the Trocadero are vastly improved, as 90 per How the reflecting spot on a nail is found. S on the stage to the seat No. 25, on the longitudinal cent of the echoes have disappeared. M. Lyon, who had carried out all work at his own expense,…
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