Raw Materials. The main component of brass is copper. The amount of copper varies between 55% and 95% by weight depending on the type of brass and its intended use. Brasses containing a high percentage of copper are made from electrically refined copper that is at least 99.3% pure to minimize the amount of other materials.
Principal Scientist in Boston, Massachusetts Salary. A Principal Scientist in Boston, Massachusetts earns an average salary of $123,925 per year.
For new forensic scientists, the typical forensic scientist salary is between $48,000 and $60,000 per year. Overall, the median in 2010 was $51, 570, BLS data from 2010 shows. Within the forensic science category, there are several specialties that may change salary and compensation.