Japanese warrior woman with naginata
Japanese warrior woman with a large Naginata. A naginata is a pole weapon that was traditionally used in Japan by members of the samurai class. It consists of a wood shaft with a curved blade on the end, similar to the Chinese Guan Dao or European glaive or Russian sovnya. Usually it also had a sword-like guard (tsuba) between the blade and shaft as depicted on this card. During the Edo Period, as the naginata became less useful for men on the battlefield, and became a symbol of the social status of women of the samurai class. A functional naginata was often a traditional part of a samurai daughter's dowry. Women of the samurai class were expected to be capable of defending their homes while their husbands were away at war!
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10417767
Perpetual motion machine, 19th century
Perpetual motion machine. Historical diagram of a perpetual motion machine. The machine consists of bellows (F), which are pumped by the rod P, which is moved by the crank N and wheel L. The wheel L is turned by the rod K, which is moved by the crank H. Crank H is attached to the axle B, which is in a tank of water and driven by 6 bladders (C). When at their lowest point the bladders are filled with air from the bellows. This makes them buoyant and so turns the axle B in a clockwise direction. When the bladder leaves the water the knob S opens the valve Q, which lets the air out of the bladder. Such a machine could not work as it would violate the law of the conservation of energy. Artwork from Mechanics Magazine (December 1823).
© Sheila Terry/Science Photo Library
The Mersey Tunnel - under the River Mersey
The Mersey Tunnel - under the River Mersey between Liverpool and Birkenhead - interior and associated structures - The Ventilating Shaft at Pier Head, the Junction Chamber, showing the main and branch tunnels and the Main Entrance and Great pylon light. Date: 1934
© Mary Evans / Grenville Collins Postcard Collection
1934, Architectural, Architecture, Birkenhead, Branch, Chamber, Dec15, Entrance, Great, Head, Interior, Junction, Light, Liverpool, Main, Marvel, Mersey, Merseyside, Pier, Pylon, Shaft, Structures, Tunnel, Tunnels, Ventilating