| 11. | Once the instrument was properly adjusted, a photographic plate was inserted and exposed.
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| 12. | The flying-spot store used a photographic plate as the store of binary data.
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| 13. | Astrographs using astronomical photographic plates sped the process in the early 20th century.
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| 14. | The program's nearly 7, 000 photographic plates are now archived at Lowell Observatory.
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| 15. | However, despite that, well-wrapped photographic plates at an adequate distance weren t exposed.
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| 16. | Blinking two photographic plates enabled a person to spot the differences.
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| 17. | Photographic plates were taken with the ESO's 1-meter Schmidt Telescope at La Silla.
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| 18. | The subject and the photographic plate holder were similarly supported within the sandbox.
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| 19. | Several astronomers at Hamburg observatory took more than 1700 photographic plates.
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| 20. | This allowed creating more sensitive photographic plates than previously possible.
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