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 2013 professors at Boston College had an effective annual salary of $224,598. This is $12,341 more than professors earned in 2012, the most recently reported prior year, and a 5.5 percent increase in effective annual salary over the previous year's average annual salary ($212,257).n 2013 professors at Boston College had an effective annual salary of $224,598. This is $12,341 more than professors earned in 2012, the most recently reported prior year, and a 5.5 percent increase in effective annual salary over the previous year's average annual salary ($212,257).