Search PDFBooksWorld

PDF Books in Technology & Engineering

Refine Search


The Useful Arts Employed in the Construction of Dwelling Houses

The Useful Arts Employed in the Construction of Dwelling Houses

by Anonymous

The dwellings of mankind, at first rude and simple in the extreme, increase in complexity as their inhabitants advance in civilization. Primitive dwellings are scarcely distinguished by signs of superior skill or sagacity above the holes and nests of the lower animals. The hut of the Hottentot may be considered as an inverted nest, and it is certai..

The Boys' Book of Model Aeroplanes

The Boys' Book of Model Aeroplanes

by Francis A. Collins

N the boy’s calendar nowadays the aëroplane season comes in with sledding and runs all through skating, marble, top, kite-flying, and bicycle time. The delights of all the old games seem to be found in this marvelous new toy. The fun in throwing a top cannot compare with that of launching an aëroplane, while kite-flying is a very poor substitute fo..

Bee-keeping for profit

Bee-keeping for profit

by W. S. Morley

It is only in comparatively recent years that attention has been given to bee-keeping on a scientific basis. Aforetime there were certain traditional methods to be followed to secure the honey harvest, but those who practised them knew neither the why nor wherefore. To-day, however, thanks to the observations of our great scientists on the life and..