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An Automatic Oil Muffle Furnace, circa 1910. Petroleum is contained in tank A, and is kept under pressure by pumping at intervals with the wooden handle, so that when the valve B is opened, the oil is vaporized by passing through a heating coil at the furnace entrance, and when ignited burns fiercely as a gas flame.
A 19th-century assay laboratory in Tombstone Courthouse State Historic Park, Arizona. A model of a late 19th-century Canadian seal used to certify the quality of assayed gold. A metallurgical assay is a compositional analysis of an ore, metal, or alloy, usually performed in order to test for purity or quality.
The use of microwave energy allows for fast sample heating, reducing digestion time to as little as one hour. Another common means to decompose samples for elemental analysis is dry-ashing, in which samples are incinerated in a muffle furnace. [2] The resultant ash is then dissolved for analysis, usually into dilute nitric acid.
A gas bubbler is a piece of laboratory glassware which consists of a glass bulb filled with a small amount of fluid—usually mineral or silicone oil, less commonly mercury. The inlet to the bulb is connected to a ground glass joint, while the outlet is vented to the air. Gas bubblers are used to exclude air from a reaction or a system.
A 'muffle' is the incineration chamber where the body is put. In order to improve the speed at which bodies burned, the muffles were internally joined, resulting in the ashes of individual bodies being mixed. This was illegal, but all subsequent multi-muffle ovens built for the concentration camps were designed in the same way.
A metallurgical furnace, often simply referred to as a furnace when the context is known, is an industrial furnace used to heat, melt, or otherwise process metals. Furnaces have been a central piece of equipment throughout the history of metallurgy ; processing metals with heat is even its own engineering specialty known as pyrometallurgy .
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