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  2. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    Dogs have two cone opsins at 429 nm and 555 nm, so see almost the entire visible spectrum of humans, despite being dichromatic. [30] Horses have two cone opsins at 428 nm and 539 nm, yielding a slightly more truncated red vision.

  3. Handkerchief code - Wikipedia

    en.wikipedia.org/wiki/Handkerchief_code

    The handkerchief code (also known as the hanky code, the bandana code, and flagging) [1] is a system of color-coded cloth handkerchief or bandanas for non-verbally communicating one's interests in sexual activities and fetishes. The color of the handkerchief identifies a particular activity, and the pocket it is worn in (left or right ...

  4. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Chart of the Morse code 26 letters and 10 numerals [1]. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur [2]. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.

  5. Timeline of United States inventions (1890–1945) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    The Babcock test was the first inexpensive and practical test which were used to determine the fat content of milk. Invented by Stephen Moulton Babcock in 1890, the test was developed to prevent dishonest farmers who could, until the 1890s, water down their milk or remove some cream before selling it to the factories because milk was paid by ...

  6. CMYK color model - Wikipedia

    en.wikipedia.org/wiki/CMYK_color_model

    The CMYK color model is based on the CMY color model, which omits the black ink. However, the imperfect black generated by mixing commercially practical cyan, magenta, and yellow inks is unsatisfactory, so four-color printing uses black ink in addition to the subtractive primaries. Common reasons for using black ink include: [2]

  7. Color code - Wikipedia

    en.wikipedia.org/wiki/Color_code

    The earliest examples of color codes in use are for long-distance communication by use of flags, as in semaphore communication. [1] The United Kingdom adopted a color code scheme for such communication wherein red signified danger and white signified safety, with other colors having similar assignments of meaning.

  8. Tachibanakan To Lie Angle - Wikipedia

    en.wikipedia.org/wiki/Tachibanakan_To_Lie_Angle

    Tachibanakan To Lie Angle (立花館To Lieあんぐる, Tachibana-kan To Rai Anguru), also known as Tachibanakan Triangle or Love to Lie Angle, is a Japanese yuri manga series by Merryhachi. It was serialized in Ichijinsha 's Comic Yuri Hime magazine from November 2014 to April 2020.

  9. Where Sleeping Dogs Lie - Wikipedia

    en.wikipedia.org/wiki/Where_Sleeping_Dogs_Lie

    Where Sleeping Dogs Lie is a 1991 American neo noir thriller film directed by Charles Finch and starring Dylan McDermott, Tom Sizemore, and Sharon Stone. The primary location for the film was C.E. Toberman Estate in Hollywood , a large Mediterranean-style, 22-room house built at the top of Camino Palmero in 1928 by C. E. Toberman .