…but it is 100 this week. Stainless steel patents had existed earlier, but the first fully functional, modern stainless steel (defined as a steel alloy that contained 0.24% carbon and 12.8% chromium) wasn’t made until August 13, 1913 by metallurgistHarry Brearley in an effort to find a more erosion-resistant metal for rifle barrels. And it’s still in kitchens, cladding buildings, in sterile labs and factories, on your watch, on cars and of course in guns, not to mention that it was probably in your mouth at some point this week, (if you’re not addicted to takeout and finger foods).
1865 – Carbolic Acid In Surgery Results From People Realizing Germs Exist
In 1865, Dr. Joseph Lister became the first surgeon perform an operation using carbolic acid (phenol) as an antiseptic. He had studied Louis Pasteur’s germ theory of disease, learning bacteria cause infections. Reasoning that carbolic acid was used in sewage treatment, he decided that they must be effective to kill germs elsewhere. The first beneficiary of his discovery was a 12-year-old named James Greenlees, age 12, whose wounded leg healed with no infection after a surgery with that included carbolic acid and linseed oil. With his new antiseptic practices, Lister’s surgical death rate dropped 30%, from 45% to 15%. Unfortunately for the punctured and ruptured around the world, though, his innovation was slow to catch on. An excellent article by Atul Gawande in last week’s New Yorker examines why Lister’s discovery was so slow to spread when the contemporary discovery of using anesthesia in surgery spread like wildfire.
1777 – Hans Christian Ørsted Was Born, Identified What Caused Magnetic Fields, Made Aluminum
Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.