The Outdoor Girls of Deepdale was the first book in a long-running series centering around four girls: Betty Nelson, Mollie Billette, Amy Stonington, and Grace Ford. The girls go on many exciting adventures and solve mysteries. In this book the girls go on a long walking tour and in the process find a hundred dollar bill. Who owns the money and why is such a mysterious note attached? (Introduction by Elizabeth Wilcox)

Thomas H. Huxley, an English biologist and essayist, was an advocate of the theory of evolution and a self-proclaimed agnostic. A talented writer, his essays helped to popularize science in the 19th century, and he is credited with the quote, “Try to learn something about everything and everything about something.” In The Advance of Science in the Last Half Century, he presents a summary of the major developments in Physics, Chemistry and Biology during the period 1839-1889 and their impact on society, within the historical context of philosophical thought and scientific inquiry going back to Aristotle...