Search PDFBooksWorld

PDF Books in Science

Refine Search


Physiology and Hygiene for Secondary Schools

Physiology and Hygiene for Secondary Schools

by Francis M. Walters

The aim in the preparation of this treatise on the human body has been, first, to set forth in a teachable manner the actual science of physiology; and second, to present the facts of hygiene largely as applied physiology. The view is held that "right living" consists in the harmonious adjustment of one's habits to the nature and plan of the body, ..

Theory of Circulation by Respiration -  Synopsis of its Principles and History

Theory of Circulation by Respiration - Synopsis of its Principles and History

by Emma Willard

First step in the discovery—Animal Heat the product of Respiration. Second step—Heat evolved in the lungs by Respiration there produces Expansion. Third step—Expansion; implied motion, which from the organism must conduct the blood to the left ventricle of the Heart. Theory imperfect, until the formation of sufficient vapor or steam in the lungs is..

Animal Sanctuaries in Labrador

Animal Sanctuaries in Labrador

by William Wood

All to whom wild Nature is one of the greatest glories of the Earth, all who know its higher significance for civilized man to-day, and all who consequently prize it as an heirloom for posterity, are asked to help in keeping the animal life of Labrador from being wantonly done to death.There is nothing to cause disagreement among the three main cla..

Draft of a Plan for Beginning Animal Sanctuaries in Labrador

Draft of a Plan for Beginning Animal Sanctuaries in Labrador

by William Wood

The original address on Animal Sanctuaries in Labrador was published in the spring of 1911. The Supplement was published in the summer of 1912. The present Plan, or Second Supplement, is now being submitted for consideration to the Fourth Annual Meeting of the Commission of Conservation at the beginning of 1913.These papers are published for free d..

Our Vanishing Wild Life -  Its Extermination and Preservation

Our Vanishing Wild Life - Its Extermination and Preservation

by William T. Hornaday

The preservation of animal and plant life, and of the general beauty of Nature, is one of the foremost duties of the men and women of to-day. It is an imperative duty, because it must be performed at once, for otherwise it will be too late. Every possible means of preservation,—sentimental, educational and legislative,—must be employed.The present ..

Physiology

Physiology

by Sir M. Foster

This Primer is an attempt to explain in the most simple manner possible some of the most important and most general facts of Physiology, and may be looked upon as an introduction to the Elementary Lessons of Professor Huxley.In my descriptions and explanations I have supposed the reader to be willing to handle and examine such things as a dead rabb..

The Extermination of the American Bison

The Extermination of the American Bison

by William T. Hornaday

It is hoped that the following historical account of the discovery, partial utilization, and almost complete extermination of the great American bison may serve to cause the public to fully realize the folly of allowing all our most valuable and interesting American mammals to be wantonly destroyed in the same manner. The wild buffalo is practicall..

Supplement to Animal Sanctuaries in Labrador

Supplement to Animal Sanctuaries in Labrador

by William Wood

The appeal prefixed to the original Address in 1911 announced the issue of the present supplement in 1912, and asked experts and other leaders of public opinion to set the subject on firm foundations by contributing advice and criticism.The response was most gratifying. The twelve hundred review copies sent out to the Canadian press, and the hundre..