- Steam Engine — 2023-10-08 00:19:36
…ngines were in the pumping of water from deep mineshafts. In mineshaft pumps the reciprocating beam was connected to an operating rod that descended the shaft to a pump chamber. The oscillations of the operating rod are transferred to a pump pisto…
…xcess pressure. Reliable and safe operation came only with a great deal of experience and codification of construction, operating, and maintenance procedures. @@{{adsense}}@@ … - Electric Generator — 2023-09-23 12:04:37
…radayDiskGenerator.jpg" class="left" title="Faraday Disk Generator" width="" }} In 1831 Michael Faraday discovered the operating principle of electromagnetic generators. The horseshoe-shaped magnet (A) created a magnetic field through the disk (D)…
- Antiseptic — 2021-08-12 20:38:14
…ions and made surgery safer for patients. Lister was appalled that a surgeon was not required to wash his hands before operating on a patient. Surgeons at the time took pride in the accumulated blood stains on their unwashed operating gowns as a di…
…% carbolic acid solutions. Instruments were also washed in the same solution and assistants sprayed the solution in the operating theatre. == Little Organisms == As the "germ theory of disease" became more widely accepted, infection from surgery d… - Underground Railway — 2019-10-23 19:35:16
…="TrainTube.jpg" class="right" title="Modern Tube Train" width="400" }} A second underground line, the District, began operating five years later. The two were eventually linked to create the Circle line. {{tag ids="Train Tube Underground Railway …
- Speedfit — 2017-05-11 00:37:50
…Doncaster [[Yorkshire]], [[England]] in 1927. John Guest Ltd. is a family-owned company that was founded in 1961. Now operating in UK, Europe, North America, Korea and New Zealand. == Push-Fit Connectors == {{Image url="speedfit-tee.jpg" class="l…