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  2. Melencolia I - Wikipedia

    en.wikipedia.org/wiki/Melencolia_I

    A ladder with seven rungs leans against the structure, but neither its beginning nor end is visible. A putto sits atop a millstone (or grindstone) with a chip in it. He scribbles on a tablet, or perhaps a burin used for engraving; he is generally the only active element of the picture. [23]

  3. Imaginary chair - Wikipedia

    en.wikipedia.org/wiki/Imaginary_chair

    A wall sit. The imaginary chair or wall sit is a means of exercise or punishment, where one positions themselves against a wall as if seated. A wall sit specifically refers to an exercise done to strengthen the quadriceps muscles. [1] The exercise is characterized by the two right angles formed by the body, one at the hips and one at the knees ...

  4. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.

  5. Lean-to - Wikipedia

    en.wikipedia.org/wiki/Lean-to

    A lean-to is originally defined as a structure in which the rafters lean against another building or wall, also referred to in prior times as a penthouse. [2] These structures characteristically have shed roofs, also referred to as "skillions", or "outshots" and "catslides" when the shed's roof is a direct extension of a larger structure's.

  6. Shaker tilting chair - Wikipedia

    en.wikipedia.org/wiki/Shaker_tilting_chair

    U.S. Patent No 8771 drawing image Patent 8771 image close-up of parts Shaker ladder chair with ball swivels on rear legs for tilting. The Shaker tilting chair – named for its ball bearing or ball and socket [A] button mechanism assembled to the back two legs of a wooden chair – allowed a person to lean back in the chair without slipping or scraping the floor.

  7. Immovable Ladder - Wikipedia

    en.wikipedia.org/wiki/Immovable_Ladder

    The Immovable Ladder is a wooden ladder leaning against the right window on the second tier of the facade of the Church of the Holy Sepulchre in the Old City of Jerusalem. The ladder rests on a ledge and is attached to a window owned by the Armenian Apostolic Church. The ladder is a symbol of inter-confessional disputes within Christianity. [1]

  8. Prisoners of Profit - The Huffington Post

    projects.huffingtonpost.com/prisoners-of-profit?...

    In 2001, an 18-year-old committed to a Texas boot camp operated by one of Slattery’s previous companies, Correctional Services Corp., came down with pneumonia and pleaded to see a doctor as he struggled to breathe.

  9. Crossed ladders problem - Wikipedia

    en.wikipedia.org/wiki/Crossed_ladders_problem

    They can be interpreted as both ladders and walls being below ground level and with them in opposing sense, they can be interchanged. The complex solutions can be interpreted as wall A leaning to the left or right and wall B below ground, so the intersection is between extensions to the ladders as shown for the case a, b, h = 3, 2, 1.