Read e-book online Scientific Amusements PDF

By Tom Tit, Cargill G. Knott

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one of the experiments contained during this booklet, many are basic hobbies intended for the game of old and young, assembled around the kin desk.

Others, to the contrary, being of a truly medical personality, are designed to introduce the reader to the examine of Physics, that marvellous technology to which we owe the invention of the steam-engine, the phone, the phonograph, and lots of different wonders—a technological know-how which, there may be little question, holds in reserve many different miracles for guy.

the total of those experiments, even if basic or advanced, could be played with none distinct gear no matter what, therefore with out the least cost. Our improvised laboratory consists, as you'll understand, of such articles as kitchen utensils, corks, suits, glasses, knives, forks, and plates — in reality, things like each condominium, the humblest within the land possesses.

To the younger one that needs to make himself agreeable and enjoyable in corporation, this booklet can be probably the most valuable in literature. it's going to convey him not just how one can do issues during which he can render himself extra wonderful than the simplest talker or the simplest joker within the corporation, yet will divulge to him 100 issues during which he can amuse and astonish everyone he is familiar with. For the experiments the following displayed are usually not merely interesting, yet instructive; not just a laugh, yet fantastic; not just appealing to the younger guy and the maiden, yet to the outdated guy and the matron. via the easiest and most common items, constantly handy, the reader can illustrate one of the most awesome issues in technological know-how, and bring worthy guide whereas a laugh his viewers and making a feeling of admiration for the amusement-maker.

To the trainer who needs to create in his students an curiosity in technology, no ebook might be of better information. it is going to permit him virtually to demonstrate and implement medical ideas, and render his directions as fascinating as an Arabian story.

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Example text

N a simple manner. n diameter, and 011t of this oiroular portion out out a. meter. Place the sheet of cardboard with the la:rge circula:r hole in it on a table, and the small circle may then be made to move within it with a rolling motion on the large circular contour. s the small circle performs its rolling motion, the needle will describe a diameter of the large circular hole. To prove this, stretch a thread through the eyes of two noodles placed in line with a. diameter of the large circle and on opposite sides, as shown in the figure.

Fold the part A along the line CB, as shown in Fig. 3. Then a. ted in Fig. 4. If, 68 SCIENTIFIC AMUSEMENTS. 58 however, CE fall$ short of CD in the last folding, it is clear that we began with too small an angle ACB. Undo the foldings and readjust ACB, and then fold again as described, until the compact form of Fig. 4 is obtained. fter the third folding to any convenient point to the right of the apex C, this triangular part cut off will, when opened out, have the form of the five-pointed star.

Not only will all sections of the oone by planes parallel to the circle be also circles, but there is another set of parallel planes inclined to the fll'st eet which will also give circular sections. These are known as the circular sootions of Apollonius, the ancient geometer who discovered them. To demonstrate the existence of these other circular sections, set the wheel at right angles to the screen, and move it to and fro along the line equidistant from the candles. ions, aa they are called ; and now if we rotate the wheel the two shadows will appear to be rotating in opposite directions.

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Scientific Amusements by Tom Tit, Cargill G. Knott


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