The Plankton of Echo River, Mammoth Cave is a scientific study conducted by Charles Atwood Kofoid in the year 1900. The book is a comprehensive analysis of the plankton found in the Echo River, which flows through the Mammoth Cave system in Kentucky, USA.Kofoid's research was groundbreaking at the time, as it was one of the first studies of its kind to be conducted in a subterranean environment. The book contains detailed descriptions of the various...