File:Gray4.png
Gray4.png (580 × 341 pixels, file size: 58 KB, MIME type: image/png)
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Summary
| DescriptionGray4.png | Formation of polar bodies in Asterias glacialis. (Slightly modified from Hertwig.) In I the polar spindle (sp) has advanced to the surface of the egg. In II a small elevation (pb1) is formed which receives half of the spindle. In III the elevation is constricted off, forming the first polar body (pb1), and a second spindle is formed. In IV is seen a second elevation which in V has been constricted off as the second polar body (pb2). Out of the remainder of the spindle (f.pn in VI) the female pronucleus is developed. | ||||||||||||||||||||
| Plate InfoField | 4 | ||||||||||||||||||||
| Date |
before 1858 date QS:P,+1858-00-00T00:00:00Z/7,P1326,+1858-00-00T00:00:00Z/9 |
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| Source |
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| Author |
creator QS:P170,Q955620 |
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Book
| Henry Gray: Gray's Anatomy (20th edition)
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| Author |
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| Editor |
Revised by Warren H. Lewis |
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| Illustrator |
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| Title | |||||||||||||||||||||||
| Edition |
20 |
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| Object type |
version, edition or translation |
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| Page overview | list of all the plates | ||||||||||||||||||||||
| Language |
English |
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| Publication date |
1918 |
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| Place of publication |
Philadelphia / New York City |
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| Source | Bartleby | ||||||||||||||||||||||
Licensing
This file is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
This tag is designed for use where there may be a need to assert that any enhancements (eg brightness, contrast, colour-matching, sharpening) are in themselves insufficiently creative to generate a new copyright. It can be used where it is unknown whether any enhancements have been made, as well as when the enhancements are clear but insufficient. For known raw unenhanced scans you can use an appropriate {{PD-old}} tag instead. For usage, see Commons:When to use the PD-scan tag. | |||||
Captions
Items portrayed in this file
depicts
59,614 byte
341 pixel
580 pixel
image/png
9e76ce3df04c561a166297f7ed48bc2cab12ce8c
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:22, 23 January 2007 | 580 × 341 (58 KB) | Pngbot | optimized with optipng |
File usage
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