Address by Prof. Robertson Before Rotary Club At Thursday's Rotary Club hold at the Astor House, Prof.
Robertson gave an address television", a further and more detailed study of the subject than was possible at the previous lecture when he spoke on "A discussion on fic developments." son said that no discussion on "Television" was posible without it being connected with -radio and the phonofilm, for the three were, it might be said, the same with but slight modifications. To deterniine and define any scene, there were two things to be considered. Every object that prosenta itself to the eye was made up of Tight and shade in varying intensity, and these bars of light and shade held certain relative positions one to another. Those were the two problems that presented themselves in perfecting television The photo-electric cell, used in the phonofilm, was one of the principal items in 'a television outfit. THs was a round tubs mirror,, made of al and a spival wire ring, both of Which acted as terminals' to two electric wires, The object of the mirror and the spiral ying was to receive light waves and to transfer them into electric waves transmitted to the receiving station where they wore transfornied back again into light waves. The ensitivencss of these two articles was such that they recorded every reflection, sending forth electrical impulses exactly proportional to the ight waves.
High Frequency Lamp The other vital part of the television apparatus was a high frequency lamp, which acted on the same principle as the antennas of a wireless broadcasting station, This tube contained a grid made up in tthe form of a mirror which conv fed the electric impulses. received from the transmitting station into ight waves which wore reflected on the grid mirror by means of the neon gas with which the tube was filled.
The other essential was a round revolving disc, in which were cut numerous. circular holes, and the purpose of this dise was to cut out, fas it were, a minute section of the object to he presented at the vote of about 20 to the second, These holes the dise were 80 placed that when the ise revolved each hole took its respective section, from left to right across horizontally and so on down wards. As the cireulae "holes" of Aight come through the dive the light and dark bars were caught up by: three photo-electric cells which transmitted their electrical impulse eagivalents to the receiving station.
Prof, Robertson said that it was very easy for them to understand that ayrehrunization was the weeret of television, and that could only be achieved' when there was operation and ce-ordination. It was 80 in human relationships, and he Know that ax Rotarians they would do their best to live up to their deuls of service, Lhe address was illustrated with Tantern slides which made a technical subject easy of understand. ing-by all present. Tu showing a picture of Mr, Ti. Hoover, US. Secretary of Commerce, giving a television demonstration between Washington and New York, Prof. Robertson vouched the hope that he Would be the next President of the United States, which remark brought forth applause.
Text read from the printed page and cleaned; old type leaves the occasional error.