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  2. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    When H0 scale was being introduced, the motors available were too large [4] to fit in scale-sized bodies and so as a compromise the scale was increased from 3.5 mm to 4 mm to the foot, but the gauge was not changed so other elements could be shared. For 00 therefore the track is about 12.5% narrower than it should be for the scale used.

  3. Optical cage system - Wikipedia

    en.wikipedia.org/wiki/Optical_cage_system

    Optical cage system in a vacuum chamber An optical cage system is an optomechanical system that is used to mount optical elements such as lenses and mirrors together in a rigid assembly. Optical systems built this way can be more compact than can be achieved using an optical table , and the system provides more flexibility than an optical rail .

  4. Harry Partch - Wikipedia

    en.wikipedia.org/wiki/Harry_Partch

    Harry Partch (June 24, 1901 – September 3, 1974) was an American composer, music theorist, and creator of unique musical instruments.He composed using scales of unequal intervals in just intonation, and was one of the first 20th-century composers in the West to work systematically with microtonal scales, alongside Lou Harrison.

  5. Organ flue pipe scaling - Wikipedia

    en.wikipedia.org/wiki/Organ_flue_pipe_scaling

    The system most commonly used to fully document and describe scaling was devised by Johann Gottlob Töpfer. [4] Since varying the diameter of a pipe in direct proportion to its length (which means it varies by a factor of 1:2 per octave) caused the pipes to narrow too rapidly, and keeping the diameter constant (a factor of 1:1 per octave) was ...

  6. Wikipedia : Manual of Style/Chemistry/Structure drawing

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    Set the Scale value to 112. Check the Use Alpha Channel box and, finally, click Save. There tends to be an unreasonably large margin left around the diagram's extents, so it is often a good idea to crop the image in a vector program such as Inkscape before uploading it. Leave a small margin of 1.6 pt.

  7. Joseph Béranger - Wikipedia

    en.wikipedia.org/wiki/Joseph_Béranger

    A innovative scales design with bowls above the rocker system was introduced in the mass production only at the beginning of the 20th century. For a long time, Béranger scales were present on the counters of many shops. [2] He died in Marseille in 1870.

  8. ANSI/ASME Y14.1 - Wikipedia

    en.wikipedia.org/wiki/ANSI/ASME_Y14.1

    A size chart illustrating the ANSI sizes. In 1992, the American National Standards Institute adopted ANSI/ASME Y14.1 Decimal Inch Drawing Sheet Size and Format, [1] which defined a regular series of paper sizes based upon the de facto standard 8 + 1 ⁄ 2 in × 11 in "letter" size to which it assigned the designation "ANSI A".

  9. Scale (descriptive set theory) - Wikipedia

    en.wikipedia.org/wiki/Scale_(descriptive_set_theory)

    In the mathematical discipline of descriptive set theory, a scale is a certain kind of object defined on a set of points in some Polish space (for example, a scale might be defined on a set of real numbers). Scales were originally isolated as a concept in the theory of uniformization, [1] but have found wide applicability in descriptive set ...