A mercury switch (also known as a mercury tilt switch) is a switch which opens and closes an electrical circuit through a small amount of liquid mercury.Contents.he envelope may also contain air, an inert gas, or a vacuum. Gravity is constantly pulling the drop of mercury to the lowest point in the envelope. When the switch is tilted in the appropriate direction, the mercury touches a set of contacts, thus completing the electrical circuit through those contacts.
Irish stew is the product of a culinary tradition that relied almost exclusively on cooking over an open fire. It seems that Irish stew was recognized as early as about 1800.
Traditional Irish food is served in Irish pubs across regions including North America and Europe. Specific foods, such as soda bread and the Irish breakfast, have been served in Ireland for centuries. Although many people may be most familiar with famous beverages such as Irish whiskey and Guinness stout, there are some famous Irish foods that are a must-try.