When traveling, it is sometimes necessary to navigate the sun, for which you need to know the approximate time. If there are no watches with a dial, you…
Solar clock do it yourself. How to make a sundial with your own hands
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Prevention and treatment of diseases in the desert, sun and heat stroke, dehydration and salt exhaustion, bites of poisonous animals.
For desert conditions, diseases associated with exposure to high temperatures are most characteristic. These are lesions caused by either overheating of the body, or dehydration, or its desalination. …