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Zoom Inventors and Inventions |
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| BELL, ALEXANDER GRAHAM Alexander Graham Bell (March 3, 1847, Edinburgh, Scotland - August 2, 1922, Baddek, Nova Scotia) invented the telephone (with Thomas Watson) in 1876. Bell also improved Thomas Edison's phonograph. Bell invented the multiple telegraph (1875), the hydroairplane, the photo-sensitive selenium cell (the photophone, a wireless phone, developed with Sumner Tainter), and new techniques for teaching the deaf to speak. In 1882, Bell and his father-in-law, Gardiner Hubbard, bought and re-organized the journal "Science." Bell, Hubbard and others founded the National Geographic Society in 1888; Bell was the President of the National Geographic Society from 1898 to 1903. |
| BICYCLE For a bicycle diagram printout to label, click here. For more information on the invention of the bicycle, click here. |
| FOX, SAMUEL |
| GEOLOGIC TIME SCALE A geologic time scale is a diagram that details the history of the Earth's geology, noting major events like the formation of the Earth, the first life forms and mass extinctions. The first geologic time scale was proposed in 1913 by the British geologist Arthur Holmes (1890 - 1965). Holmes was also the first person to realize that the Earth was billions of years old (not millions, as had been previously believed). For a geologic time scale, click here. |
James Gregory (1638-1675), a Scottish mathematician, invented the first reflecting telescope in 1663. He published a description of the reflecting telescope in "Optica Promota," which was published in 1663. He never actually made the telescope, which was to have used a parabolic and an ellipsoidal mirror. |
John Hadley (1682-1744) was an English mathematician and inventor who built the first reflecting telescope and invented an improved quadrant in 1731 (known as Hadley's quadrant). Hadley Rille, a long valley on the surface of the moon, was named for Hadley. |
| HOLMES, ARTHUR A geologic time scale is a diagram that details the history of the Earth's geology, noting major events like the formation of the Earth, the first life forms and mass extinctions. The first geologic time scale was proposed in 1913 by the British geologist Arthur Holmes (1890 - 1965). Holmes was also the first person to realize that the Earth was billions of years old (not millions, as had been previously believed). For a geologic time scale, click here. |
| KELVIN |
A reflecting (or Newtonian) telescope uses two mirrors to magnify what is viewed. The reflecting telescope was first described by James Gregory in 1663. |
| SEXTANT The sextant is an astronomical instrument that is used to determine latitude for navigation. It does this by measuring angular distances, like the altitude of the sun, moon and stars. The sextant was invented independently in both England and America in 1731. The sextant replaced the astrolabe. The word sextant comes from the Latin word meaning "one sixth." |
The first practical electric light bulb was made in 1878 simultaneously (and independently) by Joseph Wilson Swan and Thomas Alva Edison. Sir Joseph Wilson Swan (1828-1914) was an English physicist who was determined to devise a practical, long-lasting electric light. After many years of experimentation, he found that a carbon paper filament worked well, but burned up quickly. In 1878, he demonstrated his new electric lamps in Newcastle, England. |
| TELEPHONE The telephone (meaning "far sound") is the most widely used telecommunications device. It was invented in 1876 by Alexander Graham Bell (with Thomas Watson). Bell patented his invention on March 1876 (patent No. 174,465). His device transmitted speech sounds over electric wires, and his idea has remained one of the most useful inventions ever made. |
A telescope is a device that lets us view distant objects. Early telescopes used glass lenses and/or mirrors to detect visible light. Some modern telescopes gather images from different parts of the electromagnetic spectrum, from radio waves to gamma rays. |
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| Guidelines on Writing a Report on an Invention |
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