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.
While boxty is a very traditional Irish potato dish, it is not something that was ever made in my family, and remained a significant gap in my potato repertoire. This was my chance to get the low-down on same from a native of Leitrim, where boxty is big. Rose demonstrates just how boxty is done.