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.
In 2015 female associate professors at Massachusetts Maritime Academy had an average nine month salary of $60,122 USD. This is $6,073 more than female associate professors earned in 2014, the most recently reported prior year, and a 10.1 percent increase in earnings over the previous year's average nine month salary ($54,049 USD).