Lessons in Nature Study
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In our eReader you can find the full English version of the book. Read Lessons in Nature Study Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Lessons in Nature Study
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The small sticks sold by the Chinese called by the children "punk** will answer well for this. Excellent **smoke paper** can be made by soaking strips of blotting paper or carpet paper in a solution of saltpetre and then drying them.
With strips of lighted smoke paper have the pupils explore the condition of the air about a candle-flame or about a lighted lamp. Currents of air will be seen rising above the flame and others approaching it from the sides. Care must be taken to have the air as sti...ll as possible and it is to be remembered that the heat 88 NATURE STUDY from the lighted strip produces currents in the air. This makes it necessary to manage the smoke paper so that the smoke at some distance from the burning part is allowed to fall in the way of the currents to be tested. The condition of the air about a stove, a radiator, or a register is next to be explored. The same tests may be applied to the air about a person sitting quietly in a room. These experiments will reveal the fact that in a closed room where all else is quiet, the air in all parts is in constant mo- tion, the motion being caused by some of it being heated more than the rest.
What to read after Lessons in Nature Study?
You can find similar books in the "Read Also" column, or choose other free books by Oliver P Oliver Peebles Jenkins to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The small sticks sold by the Chinese called by the children "punk** will answer well for this. Excellent **smoke paper** can be made by soaking strips of blotting paper or carpet paper in a solution of saltpetre and then drying them.
With strips of lighted smoke paper have the pupils explore the condition of the air about a candle-flame or about a lighted lamp. Currents of air will be seen rising above the flame and others approaching it from the sides. Care must be taken to have the air as sti...ll as possible and it is to be remembered that the heat 88 NATURE STUDY from the lighted strip produces currents in the air. This makes it necessary to manage the smoke paper so that the smoke at some distance from the burning part is allowed to fall in the way of the currents to be tested. The condition of the air about a stove, a radiator, or a register is next to be explored. The same tests may be applied to the air about a person sitting quietly in a room. These experiments will reveal the fact that in a closed room where all else is quiet, the air in all parts is in constant mo- tion, the motion being caused by some of it being heated more than the rest.
What to read after Lessons in Nature Study?
You can find similar books in the "Read Also" column, or choose other free books by Oliver P Oliver Peebles Jenkins to read onlineMoreLess
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