Five page copy of a broadcast titled 'Hydroculture Part III' dated October 15, 1937 broadcast over Station WAAB. Heading - Chemistry of Today. Mentioned is the relationship between animals and plants, nitrogen and bacteria, nitrate of soda, potassium nitrate and the growing of plants. Broadcast (4) written at the top of page.sciences, bill ashman collection - correspondence, chemistry of today, hydroculture part iii, john a seaverns