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- Date:
- 1917
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- January 15, 2025
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- other attachments, the body of the lantern is in the position indicated by Figure 10—lined up with the
- Date:
- 1917
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- Bausch & Lomb Optical Company The projection microscope was quite widely used throughout Europe by
- Date:
- 1917
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- January 15, 2025
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- Condensing System, Showing Light Rays Coming from Illuminant, L, Rendered Parallel by Rear Condensers, C, and
- Date:
- 1917
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- , which permit fine distinctions and details to be seen by a large audience. Model LR was originally
- Date:
- 1917
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- January 15, 2025
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- for spherical aberration by grinding to non-spherical curves. By means of this correction an image of
- Date:
- 1917
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- January 15, 2025
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- large objects placed horizontally by using the same principle for the construc- tion of an especially
- Date:
- 1917
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- January 15, 2025
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- optical bed to the front of the base by means of a strong but con- venient set screw. The microscope with
- Date:
- 1917
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- January 15, 2025
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- back of the lamp directs the light upon the object in parallel rays. By means of special methods of
- Date:
- 1917
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- lamp. The sup- port of this lamp is adjustable for height by raising or lowering the post in its socket
- Date:
- 1917
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- movable mirror in the secondary dark chamber reflects the light upward, where it is collected by a large
