RT Sound Recording DB /z-wcorg/ DS http://worldcat.org ID 277156555 LA English T1 Excursions in science. Excursions in science. Program no. 25, Program no. 26, Program no. 25, Program no. 26, A1 Tupper, Howard., Markham, Emerson., Reynolds, Neil B., Davidson, G. J., Goldin, J. David., Andrew W. Mellon Foundation., Marr Sound Archives., PB General Electric PP Schenectady, N.Y. YR 1941 AB Program no. 25: Information about the famous navigator Nathaniel Bowditch, who created the standard for naval navigation in America. Based on the written work by Neil B. Reynolds. Program no. 26: A discussion about how trace amounts of selenium and other trace elements in the soil can poison wildlife and cattle that eat vegetation grown in certain areas. Based on a research paper by Dr. J.G. Davidson.