The Story In A Chemical Fire Extinguisher - chestofbooks. com There are two classes of chemical fire extinguishers: the soda and acid tank or three-gallon type, and the one-quart pump type The latter came when the efficiency of carbon tetrachloride as an extinguishing agent became known
The Story Of The Taking Of Food For years the nations of Europe have been depending to a great extent upon supplies of nitrate of soda obtained from Chile, in South America Germany alone imported nearly a million tons of this salt annually before the war
The Wonder Book Of Knowledge | by Henry Chase Compiled And Edited By Henry Chase Hill With The Co-Operation Of Experts Representing Each Industry Illustrated with 780 photographs and drawings
The Story Of Coal Mining The bag in front is known as a "breathing bag" and has separate compartments for the inhaling and exhaling, the tube at the right leading to the former and that at the left to the exhaling compartment, which usually contains sticks of caustic soda to absorb the carbon dioxide exhaled by the wearer
The Story Of The Taking Of Food. Part 3 - ChestofBooks. com At the time the war broke out, in August, 1914, Germany was importing nearly one million tons of nitrate of soda per annum from Chile, South America This supply was immediately cut off by enemy fleets
The Story Of The Taking Of Food. Part 2 - ChestofBooks. com At the cyanamid plant at Niagara Falls, in Canada, there are seven of these great carbide furnaces, each about fifteen feet long and half as wide and one-third as deep We all have some idea of how much heat is generated in the ordinary electric arc light such as is used for street lighting
The Story Of Salt - ChestofBooks. com Salt is a chemical compound composed of two elements, sodium and chlorine Chemically it is known as sodium chloride It is one of the things which comes into our lives daily, perhaps more than any other, with the exception of water Probably no other thing than water is used more by all civilized people than salt A Salt Well
The Story In A Pin. Continued In each case a special stiff pin wire is drawn into the machine from a large hank, which is placed on a drum on the machine The wire is first passed through a series of rapidly revolving, straightening rolls which take out all twists and kinks
The Story Of Self-Loading Pistols The small arm of the previous period, the old "Brown Bess," used in the British army for 150 years, was a muzzle-loading, flint-lock musket of the crudest make
Caps And Breech-Loaders Caps And Breech-Loaders Primers were tried in different forms called "detonators," but the familiar little copper cap was the most popular No need to describe them Millions are still made to be used on old-fashioned nipple guns, even in this day of fixed ammunition Then came another great development, the breech-loader