PDF Books in Children's Science & Nature
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Some Historic Trees
by AnonymousFrom earliest times, trees have served and interested man. Primitive man found trees to be a source of food, fuel, clothing, and building material. In the dim, distant past certain trees were considered sacred as the habitat of woodland deities. Today, some giants of the forest are known for their great age and as landmarks; they are often associat..
The Steam Fire Engine and the Old-time Fire Bell
by AnonymousThe steam fire engine on display in Carillon Park represents the third, and perhaps most colorful, phase of man’s long battle against fire. During the time of the bucket brigade, fire-fighting was carried on without the help of machinery. A great step forward occurred with development of hand-operated pumping machines in the early 18th Century. Lat..
Elementary Botany
by George Francis AtkinsonThe present book is the result of a revision and elaboration of the author’s “Elementary Botany,” New York, 1898. The general plan of the parts on physiology and general morphology remains unchanged. A number of the chapters in the physiological part are practically untouched, while others are thoroughly revised and considerable new matter is added..
Harper's Electricity Book for Boys
by Joseph H. AdamsIf a handy-book of electricity like this had fallen into the hands of Thomas A. Edison when he was a newsboy on the Grand Trunk Railway, or when he was a telegraph operator, he would have devoured it with the utmost eagerness. To be sure, at that time, in the early sixties, all that we knew of electricity and its applications could have been told i..
The New Astronomy
by S. P. LangleyThe New Astronomy's author S. P. Langley's specifies in his introductory remark as I have written these pages, not for the professional reader, but with the hope of reaching a part of that educated public on whose support he is so often dependent for the means of extending the boundaries of knowledge.It is not generally understood that am..
Intelligence in Plants and Animals
by Thomas G. GentryNothing is more charming to the mind of man than the study of Nature. Religion, moderation and magnanimity have been made a part of his inner being through her teachings, and the soul has been rescued by her influence from obscurity. No longer doth man grovel in the dust, seeking, animal-like, the gratification of low and base desires, as was his w..
The Birds of Australia, Vol. 1 of 7
by John GouldHaving in the summer of 1837 brought my work on the “Birds of Europe” to a successful termination, I was naturally desirous of turning my attention to the Ornithology of some other region; and a variety of concurring circumstances induced me to select that of Australia, the Birds of which, though invested with the highest degree of interest, had be..
The Evolution Theory, Vol. 2 of 2
by August WeismannWe have endeavoured to explain the handing on of the complement of heritable qualities from one generation to another as due to a continuity of the germ-plasm, and we assumed that the germ-cells never arise except from cells in the 'germ-track'; that is, from cells which are equipped, from the fertilized egg-cell onwards, with a complete sample of ..