Search results
Results from the WOW.Com Content Network
1st century AD – Pliny in his Natural History records the story of a shepherd Magnes who discovered the magnetic properties of some iron stones, "it is said, made this discovery, when, upon taking his herds to pasture, he found that the nails of his shoes and the iron ferrel of his staff adhered to the ground". [6]
One involves breaking a magnet in two and showing that both parts have a north and south pole. [7] He also dismisses the idea of perpetual motion. The third book has a general description of magnetic directions along with details on how to magnetize a needle. He also introduces his terella, or "little Earth". This is a magnetized sphere that he ...
Topic Inventions and discoveries Image Reference Science and medicine Sono arsenic filter was invented by Abul Hussam in 2006 [1] [2]Focused Impedance Measurement by Khondkar Siddique-e-Rabbani
Ancient humans discovered the property of magnetism from lodestone. An illustration from Gilbert's 1600 De Magnete showing one of the earliest methods of making a magnet. A blacksmith holds a piece of red-hot iron in a north–south direction and hammers it as it cools. The magnetic field of the Earth aligns the domains, leaving the iron a weak ...
The earliest Chinese literature reference to magnetism lies in a 4th-century BC book called The Book of the Devil Valley Master: "When the people of Cheng go out to collect jade, they carry a south-pointer with them so as not to lose their way." [9]: 110 [10] Electric catfish are found in tropical Africa and the Nile River.
'Magnet' is derived from the legend of Magnes, or from the territory of Magnesia. Pliny states that Magnes, the shepherd, discovered it, and the legend told of him is that while carrying a message over Mount Ida he felt his feet clinging to the earth, to the iron ore which lay thickly upon the hill. Hence the name of the Magnet.
Ars Magnesia (The Magnetic Art) was a book on magnetism by the Jesuit scholar Athanasius Kircher in 1631. [1] It was his first published work, written while he was professor of ethics and mathematics, Hebrew and Syriac at the University of Würzburg. [2] [3] It was published in Würzburg by Elias Michael Zink. [4]
The National Library of Bangladesh (NLB; Bengali: বাংলাদেশ জাতীয় গ্রন্থাগার, romanized: Bānlādēśa jātīẏa granthāgāra) is the legal depository of all new books and other printed materials published in Bangladesh under the copyright law of Bangladesh.