The treadle irrigation pump is able to lift up to 7000 litres of water per hour using the power of the human body, and can be locally made at low cost in small-scale metalworking shops. Its acceptance in Bangladesh, where it was first developed in 1984, is extraordinary, with over 500,000 pumps estimated now to be in use.;The current design offered in this manual has evolved from the Bangladesh original into a fully portable pump with both lift and pressure capacity and is especially appropriate to situations where soils are permeable, and water cannot easily be distributed through channels. The manual is intended to be read primarily by organizations engaged in economic development activities which have a particular expertise in technology transfer; it is not intended just as a step-by-step guide for the manufacturer (although it can be used in this way).

The jiko, a charcoal-burning stove consisting of a ceramic liner fitted inside a metal case, burns 25 to 40 per cent less charcoal than the traditional stoves on which its design was based. This book provides guidance on its production and promotion.

A History Of Zeppelins From Their Initial Design Through The Early Modern Era.

A History Of Zeppelins From Their Initial Design Through The Early Modern Era.

Originally published by the Goodyear Tire and Rubber Co. as a promotional, The Story of the Airship chronicles the history and development of these great "silver cruisers of the sky." Filled with photos and authoritative text, the book springs from an era when dirigibles, balloons and blimps competed against airplanes for public attention. Sadly, incidents such as those that befell the USS Macon, USS Akron and Hindenburg caused the public to lose faith in these craft. Published prior to these terrible tragedies, this book chronicles some of the stunning achievements made in the 10s, 20's and 30s. It can be seen as a testament to a golden era, when the sky was full of promise, and serene voyages of wonder were routinely made in these amazing aircraft.

Originally published in 1931, this is the story of the lighter-than-air ship. It is not generally known that the first passenger-carrying flight was made in 1783, more than a century before the Wright brothers - or that flying really began with lighter-than-air craft. Benjamin Franklin was one of the witnesses of these earliest flights and wrote home to friends in America about them.