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  2. Christoph Scheiner - Wikipedia

    en.wikipedia.org/wiki/Christoph_Scheiner

    Scheiner published Pantographice, about the pantograph which he had invented as early as 1603, and finally in 1632/1633, Scheiner published his last work Prodromus, a pamphlet against the heliocentric theory which was published posthumously in 1651.

  3. Mark Welser - Wikipedia

    en.wikipedia.org/wiki/Mark_Welser

    Christoph Scheiner observing sunspots In late 1611, the Jesuit Christoph Scheiner , a mathematics teacher at Ingolstadt , using the pseudonym Apelles latens post tabulam ( Apelles hiding behind the painting), [ nb 1 ] wrote three letters to Welser, claiming the discovery of sunspots .

  4. Pantograph - Wikipedia

    en.wikipedia.org/wiki/Pantograph

    Drafting pantograph in use Pantograph used for scaling a picture. The red shape is traced and enlarged. Pantograph 3d rendering. A pantograph (from Greek παντ- 'all, every' and γραφ- 'to write', from their original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical ...

  5. File:Sunspot instrument of Christoph Scheiner (1573-1650).jpg

    en.wikipedia.org/wiki/File:Sunspot_instrument_of...

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  6. Letters on Sunspots - Wikipedia

    en.wikipedia.org/wiki/Letters_on_Sunspots

    Mark Welser. When Jesuit Christoph Scheiner first observed sunspots in March 1611, he ignored them until he saw them again in October. Then, under the pseudonym Apelles latens post tabulam (Apelles hiding behind the painting), [14] he presented his description and conclusions about them in three letters to the Augsburg banker and scholar Mark Welser.

  7. Helioscope - Wikipedia

    en.wikipedia.org/wiki/Helioscope

    Christoph Scheiner's Helioscope. A helioscope is an instrument used in observing the Sun and sunspots. The helioscope was first used by Benedetto Castelli (1578-1643) and refined by Galileo Galilei (1564–1642). The method involves projecting an image of the sun onto a white sheet of paper suspended in a darkened room with the use of a ...

  8. Pantographic knife - Wikipedia

    en.wikipedia.org/wiki/Pantographic_knife

    Unlike the balisong knife handles that swing freely and independently, the pantographic knife uses a pantograph linkage to keep the handles aligned during opening and closing. The mechanism includes a collar that travels up the blade.

  9. Microprinting - Wikipedia

    en.wikipedia.org/wiki/Microprinting

    Microprinting is the production of recognizable patterns or characters in a printed medium at a scale that typically requires magnification to read with the naked eye. To the unaided eye, the text may appear as a solid line.

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