First of all, there's actually such a thing as a Civil War Nurse Barbie. (But no Civil War Soldier Ken, featuring horrific battle injuries).
Second, it's been pointed out in a number of places (such as here and here) that the doll is historically inaccurate. So it teaches kids bad history.
Dorothea Dix, Superintendent of Female nurses, famously set strict guidelines for all Union nurses: "They were required to be between 35-50 years old and plain-looking. [No attractive young nurses!] They were to dress in black or brown dresses and were not allowed to wear jewelry of any kind."
This is what an actual Civil War nurses' uniform looked like, complete with bloodstains:
Unlike the Union, the Confederates didn't have a nurses organization that defined what nurses should wear. But Confederate nurses tended to dress in simple, plain dresses, because that was practical.
In 1948, the Continental Can Company ran a series of magazine ads presenting "uncanny" facts about the history of canning. One of these facts was the great technological achievement from 1852 of packing an entire sheep into a huge can.
The ad didn't bother to say who exactly did this, but after a bit of googling I figured out that it was the French inventor Raymond Chevallier-Appert (1801-1892). Before Chevallier-Appert, canned food kept spoiling. He figured out that it needed to be cooked at higher temperatures. Here's the rest of the story from the Stravaganza blog:
Studying the problem, [Chevallier-Appert] decided that higher degrees of heat were needed in cooking. The apparatus called the autoclave, a closed vessel in which steam under pressure gave heat much greater than boiling water, had never been used for cooking food, however, and there was danger of over-cooking, because it lacked apparatus to measure and regulate the heat. Chevallier-Appert equipped the crude autoclave with another crude device, a manometer, which had been used for measuring heat in boilers. It would measure differences of only twenty degrees. He made it an instrument of precision, capable of measuring half a degree, and patented the invention in 1852. With greater heat, and an instrument to measure and control it, the difficulties of canning were overcome to such a degree that in June, 1852, Chevallier-Appert exhibited to scientists a whole sheep that had been cooked and sealed in a huge can in his autoclave four months before.