. Annual report of the American Institute, of the City of New York. Science. The Babcock Fire Extinguisher. Carbonic acid has been made use of in extinguishing: combustion. Here we have a Babcock fire extinguisher, a vessel containing bicarbo- nate of soda dissolved in water; this is a substance charged with car- bonic acid. In the upper part of the apparatus is a cup of sulphuric acid. By turning the handle we set free the sulphuric acid, which acts upon the bicarbonate of soda, and the carbonic acid is evolved in the form of gas, which cannot escape till we open this valve, when a jet of car
. Annual report of the American Institute, of the City of New York. Science. The Babcock Fire Extinguisher. Carbonic acid has been made use of in extinguishing: combustion. Here we have a Babcock fire extinguisher, a vessel containing bicarbo- nate of soda dissolved in water; this is a substance charged with car- bonic acid. In the upper part of the apparatus is a cup of sulphuric acid. By turning the handle we set free the sulphuric acid, which acts upon the bicarbonate of soda, and the carbonic acid is evolved in the form of gas, which cannot escape till we open this valve, when a jet of carbonic acid and of water charged with sulphate of soda is thrown upon the fire. It is not claimed that'this will take the place of water for buildings already wrapped in flames; but if we have it always on hand, so that it is only necessary to touch a spring to put it in operation, it enables us to put out the fire before it has done any serious damage. A great many fires have been already pre- vented by its Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Institute of the City of New York. [S. l. : s. n. ]
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