To combat the threat of tropical diseases such as malaria and yellow fever, the United States decided to use new measures to eradicate the disease before the construction of the Panama Canal. Under the leadership of Colonel William Crawford Gorgas, many changes were made. When it was discovered that mosquitoes were the source of the disease, Gorgas who was appointed as the head of hospital and sanitation, he made sure that containers with stagnant water were removed because mosquitoes lay their eggs there. He also built domestic water systems to eliminate the need to collect rain water. Prophylactic Quinine was supplied to the people in the area and fumigation and oiling of streams were launched. Those who were sick were quarantined and workers would sleep in screened structures so that mosquitoes would not be able to bite them. These programs resulted in the successful elimination of tropical diseases in the area and the health of workers improved.
Key points: (Servants agreed to work for 4-7 years in exchange for transportation to the colonies. Many different types of people became indentured servants. Slaves were brought to America against their will. Many different types of people were forced into slavery.
Well, at first, it was an informal, familial system inn the Early Republic, However later in the Republic it became a tuition-based system. It was greatly based of the Greek system. Many tutors in the Roman system were Greek Slaves or Freedmen.
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Compass
Explanation:
Compass is used for navigation along the seas as well as land. Sailors needed compasses to know which direction they were travelling.
Answer:
Egypt developed around the Nile River, while Mesopotamia developed between the Tigris and Euphrates rivers. With government both Egypt and Mesopotamia had a one main ruler, but Egypt had a centralized government with a pharaoh, while Mesopotamia had a government with a king. Farming surpluses lead to both civilizations becoming rich in artisans and traders. Both economies grew as a result. Both had major rivers and with leaders.
Explanation:
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