Marshall McDonald
Код 3460281
- ISBN: 978-5-5092-2629-8
Код 3460281
High Quality Content by WIKIPEDIA articles! Marshall McDonald (October 18, 1835 – September 1, 1895) was an American engineer, geologist, mineralogist, and fisheries scientist. McDonald served as the commissioner of the United States Commission of Fish and Fisheries from 1888 until his death in 1895. He is best known for his inventions of a number of fish hatching apparatuses and a fish ladder that enabled salmon and other migrating fish species to ascend the rapids of watercourses resulting in...
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