PDF Books in Children's Science & Nature
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Migration of Birds (1979)
by Frederick C. LincolnFrederick C. Lincoln's classic work on the "Migration of Birds" first appeared in 1935. It was revised in 1950 and has been out of print for several years, after selling over 140,000 copies. Unfilled requests by many individuals, clubs, and institutions prompted the Office of Conservation Education (now the Office of Public Affairs) in the U.S. Fis..
The Migration of North American Birds (1935)
by Frederick C. LincolnWhere do the birds go each fall that have nested in our dooryards and frequented the neighboring woods, hills, and marshes? Will the same ones return again to their former haunts next spring? What dangers do they face on their round-trip flight and in their winter homes? These and other questions on the migratory habits of birds puzzle the minds of..
James Clerk Maxwell and Modern Physics
by Richard GlazebrookThe task of giving some account of Maxwell’s work—of describing the share that he has taken in the advance of Physical Science during the latter half of this nineteenth century—has proved no light labour. The problems which he attacked are of such magnitude and complexity, that the attempt to explain them and their importance, satisfactorily, witho..
Dante and the early astronomers
by Mary Acworth OrrDante’s astronomy, therefore, is of wide and deep significance. To study its history is to learn a chapter in the development of the human intellect; to see the universe with his eyes is to know how it appeared, not only to his contemporaries but to men in many lands and many centuries. The system of Ptolemy was already a thousand years old when Da..
Report on the Migration of Birds in the Spring and Autumn of 1880
by John CordeauxThe following Report contains a Summary of the investigations of a Committee appointed by the British Association for the Advancement of Science at Swansea in 1880, an Abstract of which will be presented to the Association at its next Meeting. The Returns relating to Scotland have been arranged by Mr. Harvie-Brown; those for the East Coast of Engla..
An Introduction to the Birds of Pennsylvania
by George Miksch SuttonThis book is not intended to be a complete reference work. The descriptions of the birds and statements of their status are as brief as I felt I could make them under the circumstances. Many species of birds which have been recorded in Pennsylvania are not even mentioned. These are omitted so as to simplify the list for the beginner, who is confron..
The Story of Milk
by Johan Ditlev FrederiksenThe conception of this “Story of Milk” dates many years back. In his life-long study of problems connected with dairy farming and milk industries in two of the world’s greatest dairy countries, Denmark and the United States, the author has felt the need of a concise handbook covering this interesting subject. In his forty years of work in the manuf..
Wood Wanderings
by Winthrop PackardTO-DAY the September west winds have begun the fall house-cleaning by sweeping the tops of the pine woods. All the morning the little brown scales which nestle close to the base of each pine leaf as it grows, protecting it from the withering force of the midsummer sun, have been soaring and spinning in high glee, curiously lighting up with brown gl..