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2. Electric fireplace - Wikipedia

   en.wikipedia.org/wiki/Electric_fireplace

   The electric fire was invented in 1912 [2] and became popular in the 1950s. [3] Electric fireplaces found in 1950s homes were typically small and could be easily moved. [4] Techniques for electrical "flame effects" have been around since at least 1981. [5] Commercial electric fireplace techniques include the Optiflame, introduced in 1988 by ...

3. Fireplace insert - Wikipedia

   en.wikipedia.org/wiki/Fireplace_insert

   Electric fireplace inserts are made to fit any size of a brick or steel-covered hearth. Plug-in electric fireplace inserts typically connect to a common 120-volt wall plug and are placed within an existing fireplace. Electric fireplace inserts come in three form factors: Electric log inserts (which imitate a natural wood flame) Plug-in inserts

4. Crackling noise - Wikipedia

   en.wikipedia.org/wiki/Crackling_noise

   Further research into crackling noise was done in the late 1940s by Charles Francis Richter and Beno Gutenberg who examined earthquakes analytically. Before the invention of the well-known Richter scale, the Mercalli intensity scale was used; this is a subjective measurement of how damaging an earthquake was to property, i.e. II would be small vibrations and objects moving, while XII would be ...

5. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   Manufactured fireplaces are made with sheet metal or glass fire boxes. Electric fireplaces can be built-in replacements for wood or gas or retrofit with log inserts or electric fireboxes. A few types are wall mounted electric fireplaces, electric fireplace stoves, electric mantel fireplaces, and fixed or free standing electric fireplaces.

6. Remove Banner Ads with Ad-Free AOL Mail | AOL Products

   www.aol.com/products/utilities/ad-free-mail

   SYSTEM REQUIREMENTS. Mobile and desktop browsers: Works best with the latest version of Chrome, Edge, FireFox and Safari. Windows: Windows 7 and newer Mac: MacOS X and newer Note: Ad-Free AOL Mail ...

7. Decrepitation - Wikipedia

   en.wikipedia.org/wiki/Decrepitation

   D2 decrepitation is characterized by a starting heat range of about 300-700°C, the temperature can also increase rapidly for a few hundred degrees, such as in solid inclusions. D3 decrepitation is continuously heated until the rate reaches its maximum out at about 350-450°C, D3 decrepitation can be observed in carbonates and is defined by the ...