What Is a Bunsen Burner?
A Bunsen burner is a gas burner consisting of a tube with a small gas jet at the lower end and adjustable air inlet by means of which the he
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How Are Copper Pipes Made?
Copper pipes are made by pushing a long cylinder of the metal, called a billet, through a machine that has a rod in the centre of a hollow c
When Was the Stethoscope Invented?
When Was the Stethoscope Invented? The stethoscope was invented by a French doctor, René Théophile Hyacinthe Laënnec, in 1816. It consist
When Was the Iron Lung Invented?
When Was the Iron Lung Invented? In 1670, English scientist John Mayow came up with the idea of external negative pressure ventilation. Mayo
How Does a Rain Gauge Work?
How Does a Rain Gauge Work? There are many kinds of rain gauges. A standard design consists of a wide funnel at the top that feeds into a na