OCR Text |
Show 'sound of heart action carried milesjy wire WASHINGTON, March 12. An amplifying apparatus described describ-ed as so delicate as to permit a physician In ono city to make a Mtetlioscoplc study of tho heart action of a patient hundreds of miles away, was demonstrated to-da to-da to a group of army and civilian civil-ian medical men at the army signal sig-nal corps laboratories. The principle prin-ciple involved is similar to that used in transmitting President Harding's inaugural address to the great crowd that extended far beyond the ordinary reach of the human voice. The demonstration was directed direct-ed by Brigadier General George Siuler. chief signal officer Tho stethoacoplc apparatus with electrical elec-trical connection was placed over the heart of one of the laboratory assistants and tho heart beat was amplified many thousands of times, emerging through a phonograph phono-graph horn to be heard distinctly and studied by tho physicians in a room some distance from that In which the subject was located. The device may be used in connection con-nection with any telephone wire and will function, it was said at the laboratory, as far us the telephone tele-phone wires will transmit the voice in ordinary conversation. "A special heart transmitter has been designed which rests by its own weight over the patient's heart," said General Squier In describing de-scribing Ihe apparatus "The passage of the blood through the different valves of the heart causes v ibrations In an air chani-bei chani-bei wlij. ii faithfully reproduces all of the various actions. These are transmitted over the. wire to an amplifying apparatus attached to a large horn which projects Ihe sounds throughout the building." NEW YORK. March 12. The chemical warfare service has discovered a liquid poison so strong that three drops will kill any one whose skin it touches, il became known today. Palling like rain from nozzles attached to airplanes the liquid would kill sverytlilng in the alf-i alf-i rait s path, according to a high official of the service. |