What steps must a historian take to evaluate historical evidence

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on