A normal platelet count ranges from 150,000 to 450,000 platelets per microliter of blood. Having more than 450,000 platelets is a condition called thrombocytosis; having less than 150,000 is known as thrombocytopenia.
THE APPRENTICESHIP SYSTEM. The term 'emancipation' which was used to describe the Act of 1833 passed by the British Government to put an end to slavery in the British Empire, is ambiguous and misleading. Slaves were not freed in the sense that they were given unrestricted control over their freedom of movement.
Slavery in America started in 1619, when a Dutch ship brought 20 African slaves ashore in the British colony of Jamestown, Virginia. Throughout the 17th century, European settlers in North America turned to African slaves as a cheaper, more plentiful labor source than indentured servants, who were mostly poorer Europeans.