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  2. Lignum vitae - Wikipedia

    en.wikipedia.org/wiki/Lignum_vitae

    Lignum vitae is hard and durable, and is also the densest wood traded (average dried density: ~79 lb/ft 3 or ~1,260 kg/m 3); [4] it will easily sink in water. On the Janka scale of hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4,390 lbf (compared with Olneya at 3,260 lbf, [5] African blackwood at 2,940 lbf, hickory at 1,820 ...

  3. Guaiacum - Wikipedia

    en.wikipedia.org/wiki/Guaiacum

    The invention of the use of Guaiacum for syphilis. The genus is famous as the supplier of lignum vitae, which is the wood of several species in the genus. [citation needed] It is the fourth-hardest variety of wood as measured by the Janka hardness test, requiring a force of 4,500 lb f (20,000 N) to embed a steel ball 0.444 in (1.13 cm) in diameter half that distance into the wood.

  4. Guaiacum officinale - Wikipedia

    en.wikipedia.org/wiki/Guaiacum_officinale

    Guaiacum officinale is one of two species yielding the true lignum vitae, the other being Guaiacum sanctum.Guaiac, a natural resin extracted from the wood, is a colorless compound that turns blue when placed in contact with substances that have peroxidase activity and then are exposed to hydrogen peroxide.

  5. Janka hardness test - Wikipedia

    en.wikipedia.org/wiki/Janka_hardness_test

    The Janka hardness test (English: / ˈ dʒ æ ŋ k ə /; [1] German:), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear.

  6. Sophora howinsula - Wikipedia

    en.wikipedia.org/wiki/Sophora_howinsula

    Sophora howinsula, commonly known as lignum vitae or Lord Howe kowhai, is a flowering plant in the legume family. The specific epithet refers to the island to which the species is endemic. [ 1 ]

  7. Guaiacum sanctum - Wikipedia

    en.wikipedia.org/wiki/Guaiacum_sanctum

    Guaiacum sanctum, commonly known as holywood, lignum vitae [4] or holywood lignum-vitae, is a species of flowering plant in the creosote bush family, Zygophyllaceae. It is native to the Neotropical realm , from Mexico through Central America , Florida in the United States , the Caribbean , and northern South America . [ 5 ]

  8. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    During one rehab class in early February focused on vulnerability, another student leader boasted about the strength of his own righteousness in the face of future temptation. “If you’re worried about being on the streets, bro, you don’t trust God enough,” he thumped, standing before the whiteboard.

  9. Ironwood - Wikipedia

    en.wikipedia.org/wiki/Ironwood

    Ironwood is a common name for many woods that have a reputation for hardness, or specifically a wood density that is denser than water (approximately 1000 kg/m 3, or 62 pounds per cubic foot), although usage of the name ironwood in English may or may not indicate a tree that yields such heavy wood.

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