By varying the proportions of copper and zinc, the properties of the brass can be changed, allowing hard and soft brasses. The density of brass is approximately .303 lb/cubic inch, 8.4 to 8.73 grams per cubic centimetre.
Milk encourages the production of stomach acid and might promote acid reflux in the middle of the night. Raise the head of your bed four to six inches to avoid heartburn during sleep by using blocks under the bedposts. This raises your upper body. Extra pillows only raise your head.
Use an over the counter acid reducer to relieve frequent heartburn. If you have heartburn two or more times per week, then an acid reducer, like an H2 blocker or a proton pump inhibitor (PPI), may be what you need. Drugs like Pepcid, Zantac, Prilosec, and Nexium are all available over the counter.