The Clifton suspension bridge: designed by a woman, built by Brunel
One of the best known landmarks in Bristol, UK, the Clifton suspension bridge first opened in 1864. It was built by the famous British engineer Isambard Kingdom Brunel, but it has recently become public knowledge that it was designed by a woman. Our science editor Sam Gouldson explains who she was and why her work isn’t more widely known.
Who really designed the bridge?
The Clifton suspension bridge was designed by a woman called Sarah Guppy. She was born Sarah Beach in 1770, but when she married her husband Samuel Guppy she took his name. She was one of the great British inventors of her time and the bridge isn’t the only thing she came up with.
What else did she design?
The invention that earned Sarah the most money was her device to prevent barnacles forming on the hulls of ships. Without barnacles the ships would be able to cut better through water and travel more quickly, and the Royal Navy paid her £40,000 for it. That may not sound like much for such a valuable design, but today it would be more than £2.3 million. Her other inventions included a kettle that not only boiled water for tea but could cook an egg and keep toast warm, a candle holder that could keep candles alight for longer and a way of treating boats so that they were more watertight. She also came up with the idea of planting willow and poplar trees on the embankments of new railways, to hold the earth together and prevent landslides.
Why isn’t she more famous?
Sarah lived during the Georgian and Victorian eras. In those times married women weren’t allowed to own property in their own name, and intellectual property such as Sarah’s inventions were no different. Her husband had to file the patents on her behalf, as the property of the Guppy family. The patent for her method of piling bridge foundations in order to create a new kind of bridge was filed in 1811, but she refused to charge others to use the idea because she felt it was for the benefit of the public. Thomas Telford, a civil engineer, used her design to build the Menai bridge in 1826, and when the competition to design the Clifton bridge was announced Sarah gave her work to Brunel. When she wrote to him to suggest the use of willow and poplar trees to reinforce railway embankments, she explained that she didn’t want the credit for her idea because she felt that women “must not be boastful”.
Cat’s Bats
Cat is 10 years old and has recently moved back from living abroad. She is settling into school in UK and learning to read and write in English (until now she was schooled in French, so it is a bit of a change). Her favourite animals are bats, and here she tells us a bit about them.
Six Ace Classroom Gadgets You Won’t Want to Miss
There’s no getting around it – school can sometimes feel like a drag. We’re willing to bet that some of these cool gadgets and new technology would make school life much easier!
Living With Rosie – My Child Has Special Needs
Rosie wrote an article last week for Jump! Mag, telling us about her life on a farm. What you did not know when you read that piece, is that Rosie has special needs. Her mother explains how it is to live with a child with special needs.
I believe that you know immediately after giving birth that your child is different somehow.
As they grow, you notice that some milestones are different from the ones that your other children had and you silently chide yourself for comparing them.
Slower with walking, not speaking, unusual behaviour, unusual reactions to noise or red food.
You live with it every day and it becomes normal behaviour to you and your family, you adapt to the child’s needs and try to help them make sense of all that their jumbled up senses bring them.