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 STEW As we said above, our recipe is as near as possible to what the original Irish Stew would have been. If you follow this recipe you will have a hearty, unctuous stew.f you have some turnip cut it into cubes and add it before the potatoes. Remember, Irish Stew was a peasant dish and those people didn't have the luxury of being culinary purists or food snobs ~ they were simply making the most of what was available to survive.