| 1. | The top of the camera had hinged doors for placing photographic plates.
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| 2. | Since the early 20th century, measures have been made with photographic plates.
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| 3. | X-rays can also trigger the chemical reaction that darkens a photographic plate.
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| 4. | There are maps and photographic plates of the battlefields in the book.
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| 5. | This took photographic plates in blue light of the entire southern sky.
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| 6. | He prepared his own photographic plates with a reduced layer of gelatin.
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| 7. | The variability of this system was discovered from photographic plates in 1935.
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| 8. | "It's a good argument for keeping old photographic plates, " he said.
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| 9. | The photographic plates produced using that camera are now stored at Yerkes Observatory.
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| 10. | It has been seen on photographic plates since at least 1887.
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मोबाइल