|   |
3rd century
|
|   |
4th century
|
|   |
5th century
|
|   |
352
|
|   |
353
|
|   |
354
|
|   |
355
|
|   |
356
|
|   |
357
|
|   |
358
|
|   |
320s
|
|   |
330s
|
|   |
340s
|
|   |
350s
|
|   |
360s
|
|   |
370s
|
|   |
380s
|
|
__NOTOC__
- An instrument to measure the density of liquids is developed in North Africa .
|