Do It Yourself Projects

How to Make a Hygrometer at Home

A homemade hygrometer, for determining the degree of moisture in the atmosphere, is shown in the accompanying sketch and consists of a board, A, with a nail at each end…

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How to make a Morse code machine – Electric Telegraph

The easily made but practical apparatus described in this chapter supplies an incentive for learning the Morse telegraphic code, which is used for sending sound signals, and for visible signals transmitted by means of flags, lamps, and heliograph mirrors. Signaling is so interesting, and on occasion can be so useful, that no apology is needed for introducing signaling apparatus into this book.

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How to make a Hygrometer for a school project

How to make a Hygrometer? - When you're planning a picnic with your friends, you need to know that the weather will be fine so that you can enjoy yourselves.…

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