Although slaves had been sold in the American colonies since at least 1619, slave labor did not come to represent a significant proportion of the labor force in any part of North America until the last quarter of the 17th century. After that time, the numbers of slaves grew exponentially.
A Pharmacologist earns an average salary of $103,686 per year. For the first five to ten years in this position, salary increases sharply, but any additional experience does not have a big effect on pay.
Industry Survey. The American Society for Clinical Pathology conducts a periodic salary survey of laboratory staff, which provides additional details and slightly different numbers. According to its 2010 survey, the average wage for technicians at the staff level was $19.78 an hour, or $40,268. Certified technicians averaged 10 percent more than their uncertified peers. Technician supervisors averaged $23.72, or $49,338 a year.