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  2. Gilbert Vernam - Wikipedia

    en.wikipedia.org/wiki/Gilbert_Vernam

    Gilbert Sandford Vernam (April 3, 1890 – February 7, 1960) was a Worcester Polytechnic Institute 1914 graduate and AT&T Bell Labs engineer who, in 1917, invented an additive polyalphabetic stream cipher and later co-invented an automated one-time pad cipher.

  3. Vein (geology) - Wikipedia

    en.wikipedia.org/wiki/Vein_(geology)

    The difference between 19th-century and 21st-century mining techniques and the type of ore sought is based on the grade of material being mined and the methods of mining which are used. Historically, hand-mining of gold ores permitted the miners to pick out the lode quartz or reef quartz, allowing the highest-grade portions of the lodes to be ...

  4. Crystal - Wikipedia

    en.wikipedia.org/wiki/Crystal

    There are distinct differences between crystalline solids and amorphous solids: most notably, the process of forming a glass does not release the latent heat of fusion, but forming a crystal does. A crystal structure (an arrangement of atoms in a crystal) is characterized by its unit cell , a small imaginary box containing one or more atoms in ...

  5. Garnet - Wikipedia

    en.wikipedia.org/wiki/Garnet

    Other shades include cinnamon brown (cinnamon stone variety), red, and yellow. [3] Because of its inferior hardness to zircon, which the yellow crystals resemble, they have also been called hessonite from the Greek meaning inferior. [32] Grossular is found in skarns, [3] contact metamorphosed limestones with vesuvianite, diopside, wollastonite ...

  6. Gemology - Wikipedia

    en.wikipedia.org/wiki/Gemology

    Gemstones are basically categorized based on their crystal structure, specific gravity, refractive index, and other optical properties, such as pleochroism. The physical property of "hardness" is defined by the irregular Mohs scale of mineral hardness. Gemologists study these factors while valuing or appraising cut and polished gemstones.

  7. White Castle vs. Krystal: 7 Major Differences - AOL

    www.aol.com/white-castle-vs-krystal-7-140015775.html

    With that being said, you may find one chain to be a more cost-effective option, even if it isn't a significant price difference. At one Florida-based White Castle, the Original Slider costs $1.19.

  8. Porphyry (geology) - Wikipedia

    en.wikipedia.org/wiki/Porphyry_(geology)

    "Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.

  9. Morton vs. Diamond Crystal Kosher Salt: What’s the Difference?

    www.aol.com/morton-vs-diamond-crystal-kosher...

    Beyond their textural differences, the biggest difference between Morton and Diamond Crystal is their sodium content. A ¼-teaspoon measurement of Morton contains 480 milligrams of sodium, whereas ...

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