Twin Placentas from the 19th Century
A mother sent her placenta to be studied after she birthed two twin boys. One of the boys was healthy, while the other was tiny and compressed into the placenta. Apparently, she had a condition where the one boy crowded and essentially killed the other one.
Deadly Steam Atomizer
This is a carbolic acid steam atomizer. It was developed by Lord Joseph Lister in the early 20th century. The atomizer released a cloud of germ-killing carbolc acid which ended up soaking the entire room in a bizarre liquid. The surgeon himself was even wet!