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.
Since their country is surrounded by water, the Irish enjoy many types of seafood, including salmon, scallops, lobster, mussels, and oysters. However, meat is eaten more frequently at Irish meals. The most common meats are beef, lamb, and pork.A typical Irish dinner consists of potatoes (cooked whole), cabbage, and meat. Irish stew has been recognized as the national dish for at least two centuries. To make Irish stew, all the ingredients are assembled in layers in a large stew pot. 2  Begin with layers of sliced potatoes, onions, and carrots. 3  Top with a layer of Canadian bacon and lamb. 4  Sprinkle liberally with salt and pepper.