PICTURES IN THREE DIMENSIONS SHOWN.

Shannon News, 12 April 1929, Page 4

PICTURES IN THREE DIMENSIONS SHOWN.

MUSIC TRANSMITTED ON BEAM OF LIGHT*

HEAT OP BLUSH MEASURED

NEW YORK, Mar. 1

Researchers have succeeded in turning heat into magnetism. A new " thermo-magnet, ’ 5 in which a tiny flame from a single gas burner actuates a magnet capable of supporting more than.4oo pounds, was shown.- for-, the first, time at a dinner just given by the American Institute -of-the City of New York, The demonstration'was one of a group of exhibitions which brought together some of the most important recent natural scientific accomplishments. Music was transmitted on a beam of light; coloured pictures were shown in three dimensions; the heat from n girl’s b’.usli was measured; a flash of artificial lightning broke an atom into pieces anil "pure’’ sunshine was eaten by. the dinner guests. "Thermo-Magnet" Shown.. . The "thermo-magnet,’’ which is - -2 invention of Dr. Paul E. Klopstog, research director of the Central Scientific Company of Chicago, was demonstrated by Dr. F. C. Brown,, director of the Museum of Peaceful Arts, which cooperated with the Institute and Science Service in arranging the dinner. The magnet consists of a copper bar shaped somewhat like a capital, "R." One of the legs of the "R" is pfficed in a glass of iced water and the gas flame is. placed--against, the other leg. The difference in temperature causes a flow of electricity, which has been measured as 135 amperess This magnetises the piece of iron so heavily that it will easily support the weight of two large men. The transmission of music on a beam of light, demonstrated by John B. Tay-. lor of the General Electric Company, represents a new application of the photo-electric tube. At the sending end the sound is made to control variations in a beam of light. As this beam falls on the photo-electric tube it sets up corresponding variations in the current passing through the tube which, in turn, actuate a loudspeaker. Three-Dimension Process. The three-dimension coloured pictures were developed by Dr. C. W, Kanolt of New York, and are known as "dethographs. ’ ’ The colour process is similar to that used-in various branches of photography. The third- division is obtained by the use of a camera that swings on a short arc in front of the object being photographed. As the camera swings a screen of minute longitudinal lines is moved before the plate.* The result is a closely knitted series of photographs on the same negative. When the pictures are shown they arc placed behind a glass on-which are longitudinal lines similar to those on the screen in the camera. The picture is illuminated from the rear and the result is a stereoptic effect. The measurement of a girl’s blush was demonstrated by Dr. E. E. Fee, consulting engineer, as a novel use. of a thermopile—a delicat-o instrument for measuring heat. It is in use in tory and astronomical, experiments, lie said, but recent improvements have in-' creased its range. Atom Shattered. The lightning demonstration was staged by Dr. Gregory Breit of the Carnegie Washington. The apparatus develops a pressure of 300,000 volts and has been used for studies of the atom by shuttering it to-pieces to permit research examination. The ‘ ‘ pure ’ ’ so nshine, which was included on the menu, is a form of irradiated yeast, which the Fleischmann Laboratories hove developed. It contains,' in solidified form, the same chemical elements as. are found in a beam of light from the sun. * A process designed to. transmit coloured photographs by radio was demonstrated by its inventor, Capt. R. H. Ranger, design engineer of the Radio Corporation of America. The process uses a heat-sensitised wax paper which is repellent to writer ink. A minute jet of hot air passes across the pancr. Variations in the heat, jet are controlled by radio waves from the transmitting station. Thus the heat burn?, away > portions of the wax, permitting the colour to "set" when it is brushed on.

The workman who brushes on the colour is advised what shades to_ use bv a pre-arranged code transmitted by ordinary telegraph. Dr. Karl Compton, head of the department. of Physios of Princeton University. was the toastmaster. There were no speeches. All of the demonsi rations- spoke for themselves except for the necessary technical explanation.