This book presents the stories of american pioneers distinguished in science: Benjamin Franklin; Joseph Henry; John Torrey; James Dwight Dana; Edward... > Lire la suite
This book presents the stories of american pioneers distinguished in science: Benjamin Franklin; Joseph Henry; John Torrey; James Dwight Dana; Edward Drinker Cope; Spencer Fullerton Baird; John James Audubon ; Alexander von Humboldt; Louis Agassiz; Joseph Leidy...