The Prussian education system, developed in the 18th century, was funded by taxes and made attendance compulsory for all citizens. It provided basic education and taught obedience, duty to country, and ethics. After eight years, attendance was no longer free, but the idea of providing education to all was revolutionary. American educators were intrigued by […]
Prussian blue is a colorfast pigment discovered in 1704, used in art, laundry, microscopy, and medicine. It can treat internal exposure to cesium or thallium, but should only be taken under medical guidance due to potential side effects. Prussian blue is a pigment that has been produced since 1704, when Heinrich Diesbach discovered it almost […]
