Answer:
The poisoned substance was mixed with arsenic-free zinc and sulfuric acid, resulting in arsine gas.
The gas was later ignited and decomposed into pure metallic arsenic. This test was highly sensitive and could detect even one-fiftieth of a milligram of arsenic. It was a remarkable discovery, since before that, arsenic was widely used as poison in enormous amounts of murders, impossible to detect and trace.
Answer:
Another reason why the Middle Ages are often called the Dark Ages is because, compared with other eras, historians don't know as much about this time. In some ways, this period of time has been lost to history. Many important records from this time have not survived.
Explanation:
you can say according to the article they are called Middle ages because of the black death.
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A primary source tells you about a certain event that happened in the past and it's from that event. When studying historical events, historians want their information to be precise and correct. primary sources are firsthand, contemporary accounts of a certain event that was recorded by somebody who witnessed or experienced that event. Primary sources includes the original stuff and it's very important.
The lost loved ones. they honor them
Answer:
Dorothea Lynde Dix (1802-1887) was an author, teacher and reformer. Her efforts on behalf of the mentally ill and prisoners helped create dozens of new institutions across the United States and in Europe and changed people's perceptions of these populations.
Explanation:
