Search PDFBooksWorld

PDF Books in Science

Refine Search


The honey-bee: its nature, homes and products

The honey-bee: its nature, homes and products

by William Hetherington Harris

In these days of intense business-pressure, it is a good thing for men to cultivate hobbies. We say this, notwithstanding the fact that men with hobbies are likely to become bores, from thinking and talking too incessantly of their pet occupations, or are apt to run into extravagant expenditure of time and money, which could be better utilised. Now..

Apes and Monkeys: Their Life and Language

Apes and Monkeys: Their Life and Language

by R. L. Garner

This volume is the natural product of many years devoted by the author to studying the speech and habits of monkeys. That naturally led him up to the study of the great apes. The matter contained in this work is chiefly a record of the tabulated facts gleaned from his special field of research. The aim in view is to convey to the casual reader a mo..

The Foot-prints of the Creator

The Foot-prints of the Creator

by Hugh Miller

There are chapters in this little volume which will, I am afraid, be deemed too prolix by the general reader, and which yet the geologist would like less were there any portion of them away. They refer chiefly to organisms not hitherto figured nor described, and must owe their modicum of value to that very minuteness of detail which, by critics of ..

Tractor Principles

Tractor Principles

by Roger B. Whitman

The tractor of to-day is built in almost as many types and designs as there are tractor makers, and is far from being as standard as the automobile. There are tractors with one driving wheel, with two driving wheels, with three and with four, as well as three arrangements of the crawler principle; there are two-wheelers, three-wheelers and four-whe..

Hints to Travellers, Scientific and General, Vol. 2

Hints to Travellers, Scientific and General, Vol. 2

by Royal Geographical Society

The minimum requirement of instrumental observations by a traveller is the reading twice daily of the barometer and of the dry and wet bulb thermometers, to ascertain the temperature and humidity of the air, also the reading once daily, in the morning, of the minimum thermometer which has been exposed all night, and on days in camp of the maximum t..

The Wright Brothers

The Wright Brothers

by Fred C. Kelly

THE aim in this book has been to satisfy the curiosity of the average, non-technical reader regarding the work of the Wright Brothers, and to do so as simply as possible. No attempt has been made to go into minute technical details. Nor does the book cover the scientific researches and numerous inventions by Orville Wright since the death of his br..