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.

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.

The Berlin Wall. You may know of it. You may remember it; perhaps as a witness, an observer, a student of history, or a member of the armed forces. Whether it was local or in another country, its impact touched everyone, some in variable ways. In Hugh Allen's Through the Wall, we are shown two vastly different, but equally intriguing and moving personal histories of the barrier in Germany after World War II. In the West, we meet a young English boy, Hugh, with a fondness for adventure. In the East, we follow Hans Bernauer, from a tragic childhood to his early adulthood. These two individuals recount their experiences around the erection of the wall, with a common factor that ties them together, a model of a Sopwith Camel biplane. From the terrible loss of his Jewish parents, Hans is raised in fear and poverty, and with hopes for a better life. Later, as a member of the People's Police, the Vopos, he struggles with the ethics and morals of his position, and the situation his family and people are trapped in. On the other side, as a son of a British government employee, Hugh battles boredom and peer pressure, both forces which bring him to find a hidden treasure in a ruined house, and accidentally to cross the wall to the East. With touching and moving sentiment, we can experience Hans's pain and hunger, Hugh's worry and excitement. With direct and pointed description, we can see the ruin, filth, and destruction after the war, and we can hear the grumblings, and praise of Berliners after Hitler was killed. Through the Wall is an intriguing tale with an end that will capture the curiosity of every reader.

The Berlin Wall. You may know of it. You may remember it; perhaps as a witness, an observer, a student of history, or a member of the armed forces. Whether it was local or in another country, its impact touched everyone, some in variable ways. In Hugh Allen's Through the Wall, we are shown two vastly different, but equally intriguing and moving personal histories of the barrier in Germany after World War II. In the West, we meet a young English boy, Hugh, with a fondness for adventure. In the East, we follow Hans Bernauer, from a tragic childhood to his early adulthood. These two individuals recount their experiences around the erection of the wall, with a common factor that ties them together, a model of a Sopwith Camel biplane. From the terrible loss of his Jewish parents, Hans is raised in fear and poverty, and with hopes for a better life. Later, as a member of the People's Police, the Vopos, he struggles with the ethics and morals of his position, and the situation his family and people are trapped in. On the other side, as a son of a British government employee, Hugh battles boredom and peer pressure, both forces which bring him to find a hidden treasure in a ruined house, and accidentally to cross the wall to the East. With touching and moving sentiment, we can experience Hans's pain and hunger, Hugh's worry and excitement. With direct and pointed description, we can see the ruin, filth, and destruction after the war, and we can hear the grumblings, and praise of Berliners after Hitler was killed. Through the Wall is an intriguing tale with an end that will capture the curiosity of every reader.

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 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.