Inventors: LOUIS WINKELMANN, LOUIS WINKELMANN Current U.S. Classification: 600/2; 252/517; 252/644; 313/48; 313/54; 313/483; 607/90 Patent number: 1466777 Filing date: Sep 6, 1921 Issue date: Sep 4, 1923 Be it known that I, Louis WINKELMANN, a citizen of the United States, and residing at Hoboken, in the county of Hudson and State of New Jersey,…
Read MoreBy Richard A. Herrmann | The Journal of Chemical Education | 1974, v 51, pp 420-421 Background For nearly two decades pupils have been hearing about nuclear power plants, atomic submarines, and nuclear missiles. They always desire to “see” the strange powers of radiation that are associated with those enormous man-made nuclear devices, especially since…
Read MoreHere’s just a sampling of radioactive materials…and the many ways they improve lives. Americium -241: Used in many smoke detectors for homes and business…to measure levels of toxic lead in dried paint samples…to ensure uniform thickness in rolling processes like steel and paper production…and to help determine where oil wells should be drilled. Cadmium -109: Used to…
Read MoreThe Problems of Physics: Book V: Forces if Unknown Origin and Hidden Forces Chapter I – Universal Gravitation and Hidden Forces 1. The Causes of Gravitation The description of forces of unknown origin might really be applied to all those we have hitherto studied, since we are ignorant of their essence; but at least we…
Read MoreThe Problems of Physics: Book IV: Black Light Chapter I – Invisible Phosphorescence 1. The Divisions of Black Light The appearance in 1896 of the work of Roentgen on the x-rays determined me to publish immediately in order to settle the order of dates, a note on some particular radiations capable of passing through bodies,…
Read MoreThe Problems of Physics: Book III: The Problems of Phosphorescence Chapter I – Phosphorescence Produced by Light 1. The Different Forms of Phosphorescence The name of phosphorescence is given to the property which several bodies possess of becoming luminous after having been exposed to various influences, that of solar radiations especially. Phosphorescence, one of the…
Read MoreThe Problems of Physics: Book II: The Problems of Heat and Light Chapter I – The Problems of Heat 1. Old and New Ideas on the Causes of Heat Hardly any scientific subject has called forth so many researches as heat. Thanks to them, thermodynamics and the energetic theory, which are derived from it, have…
Read MoreThe Problems of Physics: Book I: The Dematerialization of Matter and the Problems of Electricity Chapter I – Genesis of the Current Ideas on the Relations of Electricity with Matter The first part of this work was devoted to the development of the theories deduced from my earlier experiments. This second part will be especially…
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